10 Best Performance Chips for Trucks (October 2026) Guide

Do performance chips really work? Yes, but only the ones that talk to your truck’s engine computer, and only if they are built for your year, engine and transmission. The cheap modules that promise more horsepower and better fuel economy at the same time are usually doing one of two things: restoring engine functions the factory switched off, or shifting a throttle signal. A real tuner writes new calibration to the ECU.

A performance chip is an aftermarket device that reprograms the engine control unit through the OBD-II port or a direct flash, changing factory calibration for ignition timing, fuel delivery, boost control and shift points, without replacing engine hardware. That is the honest definition. Marketing blurs it constantly, so the rest of this guide separates the three real categories and matches them to the ten most useful modules we could verify data on, updated for 2026.

We spent several weeks reading owner reports across truck forums, Reddit threads and tuner forums, then matched every claim to a specific module. The most common owner surprise was not power. It was that a 20 HP gain changes how a truck behaves on a grade, and that a tune cannot invent low-RPM torque the hardware no longer has. If you are starting from scratch, our performance air filter guide and iridium spark plug guide cover the hardware side of the same equation.

Top 3 Picks for the Best Performance Chips for Trucks in 2026

All 10 Performance Chips for Trucks at a Glance

Every module below does a specific job. The tier column in each description tells you whether it is a throttle controller, a monitor, an inline feature-restoration module, or a true in-cab programmer that writes new calibration. Our picks are grouped roughly by that tier rather than by brand, because the tier is what determines whether you will feel a difference.

1. PEDAL COMMANDER for Dodge Ram 2007-2018 – The Throttle Fix Owners Notice First

This is the module we recommend first, and it is worth being blunt about why. It is not a tuner. It does not write new calibration, and it will not add a single horsepower to your Ram. What it does is remap the throttle pedal signal the truck sends to the ECU, which is exactly where the sluggish feeling comes from on a 3rd or 4th gen Dodge.

Fitment is broad: 3rd and 4th gen Dodge Ram 2007-2018, excluding 2011-2014 HO models, covering 3.0L, 3.6L, 5.7L, 6.4L and 6.7L engines across all trims. At seven ounces and 6.25 by 3 by 2.25 inches, it is small enough to mount out of sight under the dash.

Owners overwhelmingly describe a dramatic improvement in throttle feel on Hemi and Cummins trucks, with Sport or one setting below Sport called the sweet spot. The module is fully reversible and leaves no residual data in the ECM, which matters if you ever sell the truck or visit a dealer. Reviewers also report installation times as short as a couple of minutes with no tools at all.

The Bluetooth app is the part that divides opinion. It gives you a 36-setting slider per mode, including Eco, City, Sport and Sport+, plus a subscription-based anti-theft lock that kills throttle response if the unit is unplugged. Some owners find the anti-theft subscription annoying rather than reassuring.

Who it suits

It suits anyone whose complaint is feel rather than numbers. If the truck simply does not respond when you press the pedal, especially on a 5.7L Hemi or a diesel, this addresses the actual problem in minutes and without a dyno session.

It also suits owners who have already added an intake and exhaust and still find the pedal soft, because throttle mapping sits upstream of both. For those builds, this is a cheap complement to a performance chip for trucks rather than a substitute for one.

Where it falls short

It falls short the moment your goal is a specific power number. On a forum thread, owners switching from SCT to HP Tuners made the same point about tool quality, and it applies here: a signal box is not a tuning platform.

A minority of owners also report higher fuel consumption in the sport modes and a few electronic throttle glitches that forced removal. Sport+ is aggressive enough that starting at Sport and working up is the sensible approach.

2. Edge 84130-3 Insight CTS3 – A Monitor, Not a Tuner, and Honest About It

Read the fine print on this one carefully, because it is the item most often bought by mistake. The Insight CTS3 is a monitoring gauge. It does not reflash the ECU, so it will not change power output, throttle response or shift points. What it does is let you see what your engine is doing in real time.

That is genuinely useful. It monitors EGT, regen cycles, transmission temperature, boost, RPM and dozens of additional parameters on a full color 5-inch capacitive touchscreen with auto-dimming. It plugs straight into the OBD-II port with no wiring, and the manufacturer states a CARB executive order is not required for it.

Buyers mainly use it as a monitoring and diagnostics tool rather than a tuner, valuing the screen quality and the breadth of parameters. Edge tech support drew particular praise, with faulty units replaced at no cost. It is compatible with most domestic gas and diesel vehicles from 1996 onward, so it works as a companion to a real tuner rather than a substitute.

The screen layout is the practical complaint. Owners find configuring PIDs and gauge positions more cumbersome than on the older CTS2, and a minority report random shutoffs, freezing or overheating after extended use. First units sometimes arrive already paired to another vehicle and need a factory reset before they will read your truck.

Who it suits

It suits diesel owners towing heavy loads who need to watch EGT and transmission temperature under load, and anyone running an aftermarket turbo setup where knowing your actual boost matters. It also suits owners of a 10-speed-equipped truck who want data before they spend money on a tune.

If you plan to buy a tuner eventually, monitoring first is a sensible sequence. You can log your stock engine’s numbers, then compare them after the flash.

Where it falls short

It falls short on anyone expecting power. There is no horsepower here and no torque, and no amount of gauge configuration will change that. Buyers expecting a tuner in a touchscreen box tend to be disappointed regardless of how good the display is.

The cost also adds up. This listing sits at the higher end of the group, and official Edge mounting accessories are not inexpensive, so budget for a mount if you want it positioned where you can read it safely.

3. DiabloSport S1000 Sprint Tuner – The Cheapest Fix for GM Cylinder Deactivation

On a Silverado or Sierra with Active Fuel Management, the truck shuts cylinders off under light load and the return to full V8 power is not always smooth. The S1000 Sprint is a one-job module that turns that off, and for a 2005-2024 GM AFM truck it is the most direct fix on this list. Installation is genuinely plug-and-play at the OBD-II port.

One Silverado owner on a truck forum described a box tuner as not the highest peak power available but exactly what he needed, because disabling AFM/DOD removed the shudder, cut the number of downshifts on grades, sharpened throttle response and saved him buying a separate AFM delete module. That is the most common owner story in this category.

The device weighs 1.76 ounces and is machined rather than molded, which is why it disappears under the dash. Owners describe installation as effectively plug in and drive. It is backed by a limited one-year warranty, which is the shortest coverage in this roundup.

You do give something up. Running all cylinders on an AFM engine costs fuel economy, and reviewers note that it is not a full-featured tuner, so there is no datalogging and no custom gauge screen. If you want an economy tune alongside the disable, this is the wrong tool.

Who it suits

It suits a GM owner who has decided they do not want cylinder deactivation, period. That is a perfectly valid position: the fuel economy saving is modest, and the smoothness, sound and oil consumption improvements are real.

It also suits anyone with a 10-speed truck, since the deactivation on those applications is managed differently and an AFM delete is often the cleanest fix. Just confirm your transmission before buying.

Where it falls short

It falls short outside GM Active Fuel Management trucks. If your vehicle is not a 2005-2024 GM AFM application, this does nothing at all, so verify fitment before you order.

It also cannot add a meaningful power number beyond what the factory was already making. If your goal is horsepower on a dyno, look at a real in-cab tuner instead.

4. Max Cylinder AFM Disabler for 5.3L and 6.2L – The Highest Rated Module Here

This carries the highest average rating in the roundup, and reading the reviews explains why. The Max Cylinder module is narrower than the S1000 above, aimed specifically at 2007-2020 Chevy Silverado and GMC Sierra 5.3L and 6.2L V8 applications using AFM or DFM. Within that fitment, owners report the shudder and V4 mode simply disappear.

Unlike a reflash, it does not delete factory settings and does not require special tools. Installation is under a minute, with no battery drain and no trouble codes left behind afterward. The lifetime warranty from Dezine Group is the longest coverage in this group, and the unit is made in the USA.

Owners across multiple model years confirm the shudder is gone, the engine runs smoother, oil consumption improves and the only reported trade-off is a small fuel economy drop. Several note that the full exhaust note returns once you have aftermarket performance exhausts, because the engine is no longer muting itself.

The math is simple enough to check against your own driving. If you tow or run grades, 1-2 mpg matters much less than consistent power. If you commute mostly on flat highway at a steady cruise, the saving is larger and the benefit smaller.

Who it suits

It suits 5.3L and 6.2L Silverado and Sierra owners who have a daily driver with a 6-speed or older transmission and care more about smoothness and durability than the last mile per gallon. Owners of older AFM engines also get the secondary benefit of more consistent lubrication.

It suits anyone who wants the fix with no software dependency. There is no registration step, no update process and nothing to re-flash after a battery disconnect.

Where it falls short

It falls short on 10-speed applications, which are explicitly not supported. That single exclusion eliminates a large share of newer GM trucks, so check your transmission before anything else.

Reviewers also advise more frequent oil changes once cylinders are no longer deactivating. That is a maintenance cost, but a cheap one compared with the shudder you are removing.

5. Superchips Flashpaq F5 In-Cab Tuner – Broad GM Coverage in One Unit

The Flashpaq F5 is a true in-cab programmer rather than a signal box. It covers GM gasoline and diesel trucks from 1999 through 2016, which is an unusually wide year span for a single unit, and the in-cab mounting means you can change tune levels without parking. For a Silverado or Sierra from that era it remains a reasonable way to add real calibration.

Owners report tangible results rather than marketing numbers. Superchips Flashpaq owners on the 87-octane economy tune report 1-3 MPG gains and noticeably fewer downshifts on inclines, which matches the honest expectation for a tune rather than a build.

The USB connection is the practical upgrade over older handhelds. It makes firmware updates straightforward, and while some Superchips reviewers describe the download and registration process as a pain, that friction is much smaller on the F5 generation than on predecessors.

Be realistic about ownership, though. Owners who moved from SCT to HP Tuners reported the newer platform felt more intuitive, with faster read and write times and clearer PID monitoring. The F5 covers a wide year range but is one model generation, so its future compatibility is limited.

Who it suits

It suits a GM owner with a 1999-2016 truck who wants selectable tune levels, including a tow mode and an economy mode, plus gauge and data features in the same box. It is a good match for a high-mileage gas truck that has lost some response.

It also suits a diesel owner on that year range who wants more than a feature-restoration module. Just confirm your exact year, engine and transmission combination with the vendor before ordering.

Where it falls short

It falls short on newer trucks. If your GM is 2021 or newer, the body style and controller change and this unit is not the right answer, regardless of how well the older platform reviews.

Its gauge sophistication also trails current touchscreen tuners, and the data workflow is dated. If deep monitoring is why you want a tuner, buy the newer generation instead.

6. Range Technology RA007 DFM Module – Built for Newer GM Refresh V8 Trucks

Newer GM V8 trucks moved from AFM to Dynamic Fuel Management, and add auto start-stop on top. The RA007 is built specifically for those refresh-platform trucks and SUVs, disabling both DFM and auto start-stop through a smart inline module that integrates with the ECM.

What owners like most is the return behavior. Because it is inline and unplugs cleanly, the truck returns to its factory configuration with no trace, which means dealer service and emissions inspection are not a problem. On a truck still under warranty, that matters more than it does on an older one.

The engineering argument is durability as much as performance. Owners of newer GM refresh V8 trucks point to the end of V4/V8 shift inconsistency, the full V8 sound and the improved reliability outlook of the drivetrain, since the engine is no longer starting and stopping cylinders hundreds of times per trip.

At 6.4 ounces and 9.5 by 6 by 3 inches, it is physically small but the fitment is narrow, so this is a specific answer to a specific problem. It is not a tuner and will not raise a horsepower figure.

Who it suits

It suits an owner of a newer GM refresh V8 truck who hates auto start-stop and finds the DFM cycling inconsistent under load. It is also the safer choice for anyone still inside the factory warranty period, because removal restores the original configuration exactly.

It suits drivers who mostly carry passengers or gear at low speeds, where a shutoff engine costs you more in smoothness than it returns in fuel.

Where it falls short

It falls short on anything that is not a GM refresh V8 truck or SUV. Fitment is vehicle-specific, so confirm year, engine and trim before ordering.

The other limitation is the same one as every V8-mode module: you are choosing consistent power over economy. If your driving is dominated by steady highway miles, the trade goes the other way.

7. Z Automotive Tazer Programmer – The Most Settings on a Newer Ram

The Tazer is not a power tuner. It is a feature programmer for 2019-2024 Ram 1500 DT trucks and 2021-2024 Ram TRX, and its value is unlocking OEM settings that Ram left dormant in the controller. Over 65 adjustable vehicle settings, controlled from the steering wheel with no phone or laptop needed.

Included among them are oversized tire calibration, line lock, winch mode, rock crawl mode, cool down mode and TPMS options, plus advanced lighting options such as light shows and DRL color changes. Owners are most excited by the lighting customization and the anti-theft options.

Because control is on the steering wheel, you can change settings while driving without fumbling for a device. Installation is plug-and-play at the OBD2 port, and customer service is reported as quick and responsive.

Two practical warnings. Some units arrive programmed for the wrong vehicle and need a firmware update before first use, so check the pairing on arrival. And if you recalibrate for oversized tires, do it correctly, because a mismatch between the speedometer and the tire calibration can trigger ABS and brake warning lights.

Who it suits

It suits a Ram 1500 DT or TRX owner who wants winch and rock crawl modes for off-road, line lock for the parking lot, and lighting options the factory never exposed. Off-road forums consistently favor a module that works while moving over rough terrain, where handling a phone is not practical.

It also suits owners who fit larger tires and need the speedometer calibrated so the gauge reads true again.

Where it falls short

It falls short if you want more horsepower. Nothing in the settings list raises an engine output number, and buying it for power is the most common disappointment owners report.

Reliability has a few rough edges too. Reviewers flag menu navigation as a learning curve, the turn-signal camera feature sticking on screen until the truck is power cycled, and PIN lock functions producing erratic pedal-kill and remote-start behavior. Test the anti-theft features away from traffic before relying on them.

8. Edge 85400-300 CTS3 Evolution – Real Power Gains on a 5.9L or 6.7L Cummins

This is the one on the list that produces a headline number, and the number is real. The 85400-300 is a vehicle-specific tune for 2003-2012 Ram 5.9L and 6.7L Cummins diesels, rated at up to 175 HP and 470 lb-ft of additional torque, with selectable power levels for daily driving, towing, performance and extreme use.

That figure lands hardest on older trucks. Cummins owners with high mileage describe the tuner as transformative for lost power and shifting feel, and several report improved fuel economy afterward, which is the part most buyers assume is impossible.

The hardware is a 5-inch full-color capacitive touchscreen with auto-dimming and swipeable layouts, plus a built-in performance meter, data logger, DTC read and clear, and Wi-Fi update capability. It monitors EGT, regen cycles, transmission temperature, boost and RPM, which is exactly the parameter set a diesel owner towing needs to see.

It is also CARB EO covered, so it can be sold and used legally in all 50 states. Two things to know: the unit needs a firmware update before first use, and the higher tune levels add stress to a drivetrain that may already be old, so respect the tow and daily levels on a tired truck.

Who it suits

It suits an owner of a 2003-2012 Ram with the 5.9L or 6.7L Cummins who tows, hauls or has a high-mileage engine that has lost its punch. This is the clearest case in the roundup where a real written calibration produces a measurable outcome.

It also suits a diesel owner who wants to see EGT and transmission temperature under load, because the monitoring is built in rather than bolted on separately.

Where it falls short

It falls short outside that year and engine range, and the fitment is narrow by design. It also is the wrong choice for a gas truck, where the same 175 HP figure is not remotely achievable from calibration alone.

Reviewers note the screen can occasionally freeze and need an unplug, and a few units arrived VIN-locked and required a support process. Update the firmware and confirm the VIN registration before relying on the tow level in traffic.

9. Edge 85400-100 CTS3 Evolution Diesel – CARB Approved, With Reliability Caveats

If you are in California, CARB approval is the first filter and the hardest one to satisfy. The 85400-100 carries CARB executive order D-802-13, which allows legal sale in the state. That alone puts it in a short list, and it is the reason we chose it over cheaper options.

The unit is a 5-inch digital tuner and monitor display, USB-connected for computer software updates and installed through the OBD-II port. Owners like the lower, tow-safe tune levels for delivering real power without drivetrain drama, and the diagnostic read and clear is a genuine bonus over cheaper code readers.

Now the honest part, because this listing carries the weakest reliability feedback in the set. Owners love what the tunes do for power and economy, but report touchscreen responsiveness degrading over months and sometimes stopping entirely, and the system freezing during tune changes so that unplugging is the only fix.

Most seriously, some units lost the factory tune and could not return without dealer service. That is a rare failure, but on a daily-driven truck it is an expensive one. Manufacturer support has also been criticised for dismissing transmission shift complaints, which is worth weighing if your truck shifts harshly under load.

Who it suits

It suits a California owner with a diesel who cannot legally install an unapproved module, needs a tow-safe tune level, and wants diagnostics in the same device. For that specific buyer, the CARB executive order outweighs the reliability complaints.

It also suits an owner who wants a lower-risk tune level rather than the highest power setting available, since the conservative levels are the ones reviewers praise for towing.

Where it falls short

It falls short on hardware longevity in this generation. Screens that slow, freeze and stop responding are the dominant complaint, and the screen also feels inexpensive for what the unit costs. Tune changes are slow, which matters if you switch modes often.

If you can accept a non-approved module and live outside California, a 50-state alternative on this list gives you better hardware and better reported reliability for a similar outlay.

10. Edge 85401-101 CTS3 Evolution – The Widest Diesel Year Range Here

Twenty-six model years is the headline here. The 85401-101 is vehicle-specific for 1994.5-2020 Ford F250 and F350 Super Duty diesels, covering the 6.0, 7.3, 6.4 and 6.7 Powerstroke engines, and it is 50-state approved. If you own one of these trucks, this saves you from hunting a tuner for a specific year.

Monitoring is the other strength. It tracks transmission temperature, boost, RPM and dozens of additional parameters on a 5-inch capacitive touchscreen with auto-dimming and swipeable layouts, and it includes a performance meter plus an integrated data logger with export, so you can actually look at what a tow event did to your engine.

Multi-vehicle tune licensing is included, which matters for families or shops with two Super Duties. Unlike some single-VIN tuners, this one is not locked to one truck in a way that forces a second purchase.

The trade-offs are price and generation. This is the highest-priced vehicle-specific tuner in the roundup, and buyers echo the general complaints about CTS3-generation touchscreens slowing and freezing over time. With the smallest review base here, expect fewer data points before you buy.

Who it suits

It suits a Super Duty owner who wants one tuner to cover a long ownership cycle, particularly someone who bought an older 7.3 or 6.0 and has since moved up through 6.4 and 6.7 trucks. The wide year range is the reason to choose it over a narrower unit.

It also suits a 50-state diesel owner who needs legality everywhere rather than only a CARB executive order, and anyone who wants data export for serious towing analysis.

Where it falls short

It falls short on cost, and this is a vehicle-specific tuner rather than a general tool, so you are paying a premium for the range. If you own one specific year, a narrower tuner often costs less for the same core function.

The touchscreen complaints from this generation apply here too. If you want the widest year coverage and can tolerate a screen that may need attention after a few years, it is still the most flexible diesel option in this set.

How to Choose a Performance Chip for Your Truck

Start by naming the job, not the brand. The three tiers below differ less in marketing language than in what they write to the ECU, and the tier determines the cost, the install effort and whether your truck will actually feel different.

Tier one: inline and signal modules

These are the small boxes that plug into the OBD-II port or sit inline between factory connectors, and they usually do one thing. Disabling cylinder deactivation, stopping auto start-stop, or remapping the throttle pedal. Install effort is a few minutes, gains are felt as smoothness and response rather than a dyno number, and they are fully reversible. If your complaint is shudder, hesitation or a dead pedal, this is the correct tier.

Tier two: in-cab handheld programmers

These sit in the cabin and write full calibration to the engine and transmission controllers, with selectable levels for daily driving, towing and performance. The gains show up as real horsepower and torque, and a quality diesel unit can return lost power on a high-mileage engine. Expect a firmware step, a VIN registration, and a compatibility check before anything else. Owners who moved from SCT to HP Tuners reported the newer platform as more intuitive, with faster read and write times and clearer PID monitoring, which is the practical difference to look for.

Tier three: custom or dealer-level calibration

A custom tune written for your exact year, engine, transmission and build is the most capable option and the most expensive. It is the only tier where a dyno sheet means something, and the only tier where supporting hardware matters. Skip it if your truck is stock and you mainly want the factory functions back.

How much horsepower should you expect?

Be suspicious of any page promising large gains from a plug-in box on a stock engine. A quality inline module returns what the factory was withholding, which on a gas truck with cylinder deactivation is a meaningful mid-range improvement without a dyno number. A true in-cab tune on a modern truck with a turbo or a modern diesel can produce gains in the triple digits at the top end, with the Cummins unit on this list rated at up to 175 HP and 470 lb-ft.

The number that matters is not peak. Owners repeatedly report that a 20 HP gain feels large because it changes how the truck behaves on hills, while a tune cannot create low-end torque the hardware no longer has. One Silverado 2500HD owner warned not to expect a dramatic power boost on a gas engine, and reported instead that mid-range response improved and 2-gear downshifts on 5-6% grades stopped. That is the honest shape of a tune.

Octane, diesel versus gas, and tune order

Fuel matters more than most listings admit. Base tunes generally run on 87 octane, while tow and performance tunes commonly require 91, which owners running 87 everywhere consider a deal-breaker. Check the required octane for every tune level before you buy, and never run a high-output level on the wrong fuel.

Gas and diesel tunes are not interchangeable in approach. Gas engines are limited by knock and the air-fuel ratio, so gains come from ignition timing and boost control. Diesels make their power from boost and fueling pressure, which is why diesel tuners monitor EGT so closely. Our ECU tuning guide covers the calibration concepts in more detail.

On sequence, tune before you add hardware. Running a built engine on a stock calibration wastes the parts you paid for and adds knock risk, while a calibration written for stock hardware on a built engine leaves performance unclaimed. If cold weather or altitude is a factor in your driving, mention that to a tuner, because a calibration written for sea level and 80 degrees is not the right map for a winter mountain pass.

Compatibility and Installation: What to Check Before You Buy

Most disappointment in this category is a fitment problem, not a performance problem. Work through these five checks in order before you order anything, because most of these are discovered after the money is spent.

1. Confirm the exact fitment list, not the brand. A tuner for a GM truck may not cover the newer body style, and a module for one engine may exclude a specific transmission. The 5.3L and 6.2L AFM module on this list is the clearest example: it does not work with GM 10-speed applications.

2. Check whether your ECM needs unlocking. On 2021 and newer trucks, several brands require the ECM to be physically shipped in for unlocking before a tune can be written. This is the single most common source of frustration in current truck forums, and buyers routinely discover it only after purchase. Ask the vendor this question directly, and get the answer in writing.

3. Check VIN locking and vehicle count. Some tuners are registered to a single VIN, and some are licensed to one vehicle at a time, which forces owners with two trucks to buy two units. Look for multi-vehicle licensing if you have a second truck or a work fleet.

4. Recalibrate tires and gear ratio correctly. If you fit larger tires or change gearing, the speedometer must be recalibrated through the tuner. Done wrong, it triggers ABS and brake warning lights that owners spend real money tracing down. Our performance clutch kit guide covers the drivetrain side of that same job.

5. Confirm you can return to the factory calibration. Needed for emissions inspections and for any dealer visit. Inline modules revert cleanly by unplugging; a flashed tune needs the original file available, and on the Flashpaq class of tuner the revert is built in. Our thermostat guide covers the other half of getting a truck to run at the right temperature once a tune is in place.

On installation itself, an OBD-II plug-in module takes minutes and needs no tools. A full flash takes longer and may need the truck on a battery charger, which is why many owners report having a tuner shop handle the first flash. Check whether the vendor requires a dyno sheet or an approved installer before warranty coverage applies, and keep the paperwork.

Warranty and legality deserve one more note. A tune that alters the ECU can complicate a powertrain warranty claim, and a modified vehicle can be harder to insure or resell. A CARB executive order, where one exists, means the device is legal for sale and use in all 50 states including California. Without one, the device may be legal federally while still failing a state inspection, so check your state’s rules rather than assuming.

Frequently Asked Questions

The Best Performance Chips for Trucks in 2026: Final Word

The best performance chips for trucks are the ones matched to a specific complaint on a specific truck. Start with a throttle controller or a cylinder-deactivation disabler if the problem is feel, and move to a vehicle-specific in-cab programmer only when you want real calibration. Our top pick, the PEDAL COMMANDER for Dodge Ram 2007-2018, wins on fitment breadth, reversibility and the size of its owner base.

Whatever you pick, verify fitment for your exact year, engine and transmission, run the octane the tune level requires, and keep the ability to return to the factory configuration. Compare current ratings and owner reviews before you order, and set your expectations on mid-range response rather than a peak number.