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RacingLine PCM Plug-In tuning box for Audi RS3 8Y, Audi RS Q3, VW Golf mk8 R & GTI, Audi S3, Cupra Leon, Cupra Formentor, Škoda Octavia and many more.





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RacingLine PCM Plug-In tuning box for Audi RS3 8Y, Audi RS Q3, VW Golf mk8 R & GTI, Audi S3, Cupra Leon, Cupra Formentor, Škoda Octavia and many more.

Welcome to PCM.
      RacingLine's Plug-In Tuning Solution


for VW / Audi / Cupra / Skoda       
2.0 TSI, 2.5 TFSI & 2.0 TDI

Maybe your latest-gen car can't yet be tuned via normal methods, or you're concerned about the warranty, or your car is leased. Whatever the reason, not everyone is ready to tune their new car right now. The RacingLine PCM could be your perfect tuning solution!

PCM is RacingLine's new tuning solution, developed exclusively for cars such as Golf mk8 GTI, R, GTD & TDI,  Audi S3 8Y & A3 TDI, Cupra Leon & Octavia vRS and plus the latest 2.5 TFSI Audi RS3 8Y & RS Q3 and more.
PCM stands for ‘Power Control Module’ and is our way of bringing your new MQB 'evo' car to life with more power and torque.

Easily installed, and easily removed at any time without a trace.

How PCM works.

PCM works on a standalone PCB, which communicates with the factory ECU. Developed by RacingLine's own in-house calibration experts over the past 12 months, it allows the car to safely increase power and torque levels.

Of course, we know that many customers will want to have a full ECU calibration as soon as it's available - and who can blame them?

So uniquely, RacingLine will give any PCM customer a free upgrade to our OEM+ calibrations as soon as they are available, whenever you are ready - as long as you purchase your PCM unit from one of our OEM+ dealers. 

RacingLine PCM Plug-In tuning box for Audi RS3 8Y, Audi RS Q3, VW Golf mk8 R & GTI, Audi S3, Cupra Leon, Cupra Formentor, Škoda Octavia and many more.
RacingLine PCM Plug-In tuning box for Audi RS3 8Y, Audi RS Q3, VW Golf mk8 R & GTI, Audi S3, Cupra Leon, Cupra Formentor, Škoda Octavia and many more.
RacingLine PCM Plug-In tuning box for Audi RS3 8Y, Audi RS Q3, VW Golf mk8 R & GTI, Audi S3, Cupra Leon, Cupra Formentor, Škoda Octavia and many more.

What PCM does.

PCM runs our in-house calibration on a standalone PCB which operates in parallel with the factory ECU. This allows our software engineers to find the sweet spot for engine performance, drivability and safety. And of course, a valuable power and torque boost.

Any questions?

Want to know more? Check out our FAQ section here:

Racingline Tuning Software Remap For Golf Mk8 R, Audi S3 8y, Cupra Leon 300, Cupra Formentor 310 2.0 Tsi Ea888.4 Gen 4 Continental Turbo

Power delivery.   
Beautiful, smooth output.

Unlike some 'tuning boxes', the RacingLine PCM is a fully calibrated solution, carefully developed over months and years for each engine type by our own team of Software Engineers. Think of it as a secondary ECU.

Confirmed applications.    





2.5 TFSI EVO : RS3 8Y

400PS non-OPF (DXHA)


2.5 TFSI EVO : RS3 8V.2 OPF



2.5 TFSI EVO : RS3 8V.2

400PS non-OPF (DXHA)


2.5 TFSI EVO : RS Q3 (F3) OPF

400PS - OPF models (DNWA)


2.5 TFSI EVO : RS Q3 (F3)

400PS non-OPF models (DAZA)


2.0 TSI EA888.4 / 300-320PS

Continental turbo - higher output


2.0 TSI EA888.4 / 245PS

Garrett Turbo - lower output


2.0 TSI EA888.3 / 245PS

EA888 gen.3 IS20 for MQB Evo


2.0 TDI / 200 PS



2.0 TDI / 150 PS



2.0 TDI / 115 PS


VWR030000-IS38 / VWR030000-IS38GPF

2.0 TSI EA888 gen.3 IS38

300-310PS (higher output)

VWR030000-IS20 & VWR030000-IS20GPF

2.0 TSI EA888 gen.3 IS20

222-245PS (lower output)

Feature packed.   
It's all about the detail.

Feature packed.

Welcome to PCM.
RacingLine's Plug-In Tuning Box Solution
for Golf mk7.5 GTI & R 2021+

RacingLine's PCM controller is a great alternative tuning solution for many drivers.


It's all about the 12 months of detailed development that's gone into PCM. The PCM itself is housed in a stunning billet aluminium case, finned to ensure effective cooling plus a beautiful carbon fibre mounting bracket to locate it securely at the front of your engine bay. The full install kit includes a wiring loom made to the perfect length for each car type.


And an instant power boost is only one of the advantages:

Tuning Power gains from RacingLine PCM Tuning Box for Golf GTI, Golf R, Audi S3 8Y


Power increases of up to 40HP and 60Nm with supporting RacingLine hardware versus the factory quoted outputs. 


Just three easy connections into the wiring loom, and premade brackets for perfect, simple fitting.

Does RacingLine PCM drive well?


We’ve been developing and testing PCM for the 2.0 TSI EA888.4 engines for over a year now. 

Free software upgrades to OEM+ from RacingLine PCM


The really neat part? Purchase your PCM from an OEM+ dealer, and when our OEM+ calibrations become available, you will get your upgrades for free.

Full install fitting kit for RacingLine PCM Tuning Box

FULL MQB 'evo'

CNC machined housing, carbon fibre battery mounting bracket, perfect-fit wiring looms and matching mounting hardware.



Should you ever wish to remove it,

PCM leaves no trace on the car.

Register your PCM.

Before enjoying your new PCM, please register the serial number of your device on the website link here.


Registering your PCM will activate the device’s warranty and upgrade path to free Software. Failure to register may invalidate these resources.

How does RacingLine PCM Tuning Box work for Audi S3, Golf GTI, Golf R?


How PCM operates.

PCM works by using our in-house developed calibration running on our standalone PCB, which communicates in parallel with the factory ECU.


This communication route allows the PCM to safely optimise a variety of electronic sensor signals in real time, interfacing between the engine controls and its sensors. With multiple channels such as charge air pressure, ignition and fuelling controlled by the PCM computer, the result is increased power and torque across the whole powerband of the engine.

We have carried tens of thousands of development miles of rigorous testing on our in-house dyno, on road and on track with numerous calibrations, across multiple cars and different hardware installations, allowing us to find the sweet spot for engine performance, drivability and safety.

Is RacingLine PCM Tuning Box safe for my engine?



Every product that carries the RacingLine logo has been thoroughly track-tested. And PCM is no exception. 

Why? Because only in hard track-use can we push the car's engine to the limits, again and again. It's reassuring to know that we've done the hard work so you can get on with enjoying your car!


Hardware Compatible 

Right from the outset, PCM has been developed in conjunction with RacingLine's latest Performance Parts range. 

Whilst PCM has been developed to work perfectly on an unmodified stock car, it has also been calibrated to self-adapt to take full advantage of any RacingLine upgrades.

So adding a RacingLine intake, air filer or our Turbo Inlet Systems will really let the PCM extract the most from your engine.

Can I use air intake and hardware with RacingLine PCM Tuning Box?
What fuel grade can I use with RacingLine PCM Tuning Box?


What fuel grade can I use?

PCM has been designed to work with different fuel grades around the world, just like factory calibration does. Meaning it's perfectly safe, whatever grade fuel you put in your tank.


However, using a lower fuel grade will result in less power, meaning that a premium octane fuel is always advised.


How does PCM compare to a RacingLine ECU calibration?

We're completely honest about this: the PCM calibration is not as sophisticated as our OEM+ calibrations are.

To keep the car smooth, safe and reliable, PCM's power levels have to be kept lower than our OEM+ Stage 1 calibrations.

But of course, you'll love the power boost you get from PCM, combined with the drivability and efficiency gains. And with our free upgrade program, you can have a free OEM+ calibration as soon as it's available if that's the way you want to go!

How does RacingLine PCM Tuning Box compare with remap tuning chip-tune?


Can I install at home?

PCM has a simple installation, providing you have a basic level of mechanical knowledge. The PCM unit sits above the battery, using the provided carbon fibre battery mount and hardware, while the wiring loom is plugged into existing sensors found at the top of the engine.


Or for full peace of mind, all of our approved PCM dealers around the world can also install this for you, subject to labour charges.

RacingLine PCM Tuning Box Fitting Instructions


What's in the kit?

Simple. Everything you need for install, in a kit specifically built for your car, whether fitted with the 2.0 TSI, 2.5 TFSI or 2.0 TDI engine.

As well as the PCM box with its beautiful billet case, a carbon fibre bracket mounts it perfectly on top of the battery. The wiring loom is to the perfect length for your car. Lastly, a deactivation plug is included, should you ever choose to temporarily disconnect your PCM.

What's included to fit the RacingLine PCM Tuning Box


Is PCM removable?

PCM is completely removable, with no changes to be made to the hardware or software of the original car.


We also include a PCM blanking unit, which plugs into the existing wiring loom and removes the PCM calibration, without having to remove any of the installed hardware.

Can RacingLine PCM Tuning Box be detected?


Does PCM affect warranty?

It's very clear - any tuning modification on your vehicle can invalidate your manufacturer's engine & powertrain warranty. So if your dealer sees the PCM fitted, then they'd be entitled to reject a warranty claim on the engine or drivetrain.

Of course, PCM is fully removable. With it removed, the car is returned to true stock, but whilst PCM leaves minimal trace to the ECU, it's important to understand that there is no guarantee that this product is warranty safe and is installed at the customers’ own risk.

Will a RacingLine PCM Tuning Box void warranty?
How can I buy Can RacingLine PCM Tuning Box


Find your local OEM+ dealer

When the time comes for your free of charge upgrade to our OEM+ calibrations, you'll need to able to take your car to the RacingLine OEM+ dealer who supplied your PCM module.

It's important to be clear that, although all RacingLine dealers can supply the PCM unit, if that dealer is not OEM+ approved, then they will not be able to provide your free of charge upgrade.

Check out our dealer listing here:


Quick install


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