McLaren 675LT ExperTune Performance Software

Achieve maximum power gains (~66 whp & 43 ft-lbs) without sacrificing driveability or reliability. Maps are available for completely stock cars, or for cars equipped with Sport Cats, Cat Bypass Pipes, upgraded turbos, and more.
Once we receive your ECU, our tuner bench flashes it with the upgraded ECU map and we return it to you for easy re-installation; no modifications to the vehicle are necessary.
POWER GAINS
Stock = 582 whp / 490 ft-lbs
Tuned = 629 whp / 516 ft-lbs
Tune +
Fabspeed Sport Catalytic Converters
= 635 whp / 526 ft-lbs
Maximum gains of over 65 whp and 43 ft-lbs of torque at 8000 RPM
NOTES
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.
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.
SHIPPING DETAILS
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.)