XperTune 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 drivability or reliability by optimizing the engine's performance. Greatly enhances the power and dynamic performance and drivability 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 XperTune map, and we return it to you for easy re-installation; no modifications to the vehicle are necessary. POWER: Stock = 650 HP / 500 TQ Tuned = 700 HP / 546 TQ Peak power gains of 26 whp and 27 ft-lbs of torque Gains of 33 whp and 44 ft-lbs of torque at 4000 RPM NOTES: This is not a physical/shipped product. This upgrade requires you to send us your ECU for reprogramming. You will be emailed a download link with detailed instructions after adding this to your cart and checking out. 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. Special requests and tune file upgrades may be subject to additional fees. Enjoy your increased performance! SHIPPING DETAILS: Shipping costs for sending an ECU to Fabspeed are 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.) Purchase Disclaimer: Fabspeed Motorsport does not condone the use of emission defeat devices for any vehicles used on public streets or roadways. Fabspeed Motorsport will not tamper with, remove, disable, or bypass emissions equipment on a motor vehicle in accordance with 40 CFR Section 86.1854.12(a)(3) and the Clean Air Act 40 CFR 1068.101(b). This includes software, known as tunes, that reprograms a motor vehicle's electronic control module to alter engine performance and enable the removal of filters, catalysts, and other critical emissions controls.
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