ExperTune Performance software upgrade improves horsepower, torque, and driving characteristics by reprogramming various sensor inputs, air/fuel ratios, and boost pressure. Achieve maximum power from the McLaren 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.
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.)