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  • Achieve maximum power without sacrificing driveability or reliability by optimizing the McLaren 3.8L Twin Turbo V8 engine's air/fuel ratios, timing, boost pressure, and more.
  • Fabspeed's ECU Tune for the McLaren MP4-12C provides maximum gains of over 92 whp and 82 ft-lbs of torque at 5900 RPM
  • A customers MP4-12C receiving a Fabspeed tune to complete our Performance Package, resting between runs on our Dynojet.
  • The Fabspeed Motorsport MP4-12C is our long term development car on which we test all hardware and software solutions to ensure you get the best possible results on your own McLaren.
  • The MP4-12C ECU is easily accessible, located under the rear passenger side wheel well housing panel.

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McLaren MP4-12C ExperTune Performance Software


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FABSPEED MOTORSPORT | McLaren MP4-12C "Beast of Corsa" (00:55)
The Fabspeed built McLaren MP4-12C "Beast of Corsa". Enhanced with upgraded turbos, a full Fabspeed exhaust setup, and ECU Tune, this McLaren dominated the Corsa Rally and sounds sinister. Here it is putting down 700whp+ on our Dynojet. This MP4 has run the Corsa Rally (winning the Beast of Corsa award), tackled the Tail of the Dragon, and continues to turn heads on the street. Looking to increase the performance of your McLaren? Contact us!

Product Description

ExperTune Performance software upgrade improves horsepower, torque, and driving characteristics of the McLaren MP4-12C by reprogramming various sensor inputs, air/fuel ratios, and boost pressure. Achieve maximum power from the 3.8L Twin Turbo V8 without sacrificing driveability or reliability by optimizing the engine's performance. Greatly enhances the power and dynamic performance and driveability of this wonderful vehicle. Maps are available for completely stock cars, or for cars equipped with Sport Cats, Cat Bypass Pipes, Exhausts, upgraded turbos, and more. 

Once we receive your ECU, our tuner bench flashes it with the upgraded ExperTune map and we return it to you for easy re-installation; no modifications to the vehicle are necessary.                       


  • Fits all McLaren MP4-12C 3.8L Twin Turbo V8 vehicles (2011+)


  • Stock = 555 whp / 429 ft-lbs
  • Tuned = 606 whp / 496 ft-lbs
  • Maximum gains of over 92 whp and 82 ft-lbs of torque at 5900 RPM


  • This is not a physical/shipped product.  This upgrade requires you to send us your ECU for re-programming. You will be emailed a download link with detailed instructions after adding this to your cart and checking out.
  • Upgraded at no charge by Fabspeed over the life of the car. Can be flashed back to stock when you would like at any time.
  • While a vehicle equipped with bolt-on upgrades will experience maximum gains as a result of the increased efficiency of the engine, great power gains can be made on a completely stock vehicle!  
  • You must fill out and include a copy of the ECU Information form along with your ECU upon sending it in. Please contact us if you need to send the form in any other manner.
  • Fabspeed Motorsport saves your stock/factory ECU settings so that you can revert your vehicle back to stock settings at any time.

Enjoy your increased performance!


Shipping costs for sending an ECU to Fabspeed is the responsibility of the purchaser.  The ECU will be tuned within 24-48 hours of receiving it and Fabspeed will then ship back the ECU using whatever method it was shipped in with.  (For example: If you send in your ECU via Ground shipping, we will ship it back via Ground.  If you ship it via Overnight, we will ship it back via Overnight.)

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