Fabspeed McLaren 600LT ExperTune Performance Software


SKU: FS.MCL.600LT.ECU Categories: , ,


Achieve maximum power gains (~80+ whp & 80 ft-lbs) without sacrificing drivability or reliability. Maps are available for completely stock cars, or for cars equipped with Sport Cats, Catbypass Pipes, X-Pipe Exhausts, upgraded turbos, and more.

You wouldn’t believe all the power that’s waiting to be unlocked in your 600LT. We’ve had ample time with a 600LT on our in-house Dynojet to unlock extra power on both stock vehicles and optimize performance with Fabspeed exhaust components. 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 Hardware

  • Stock = 533 whp / 506 ft-lbs

  • Tuned = 582 whp / 506 ft-lbs

  • Maximum gains of over 80+ whp at 5600 RPM and 80 ft-lbs of torque at 5000 RPM

POWER GAINS – With Fabspeed Catalytic Converters

  • Stock = 533 whp / 506 ft-lbs

  • Tuned = 607 whp / 615 ft-lbs

  • Maximum gains of over 100 whp at 5600 RPM and 105 ft-lbs of torque at 3750 RPM


“There is a copious amount of power waiting to be had that McLaren has hidden from you. The 600LT responds incredibly well to a tune and rewards you by taking the performance to a whole new level. Our tune brings the turbos to life with a vengeance, the car reaches boost immediately and pulls hard and consistently throughout the power band. The response and power delivery is outstanding, this is a true driving machine.


  • 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 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.)

Additional information

HP (whp)

TQ (ft/lbs)

WT (lbs)


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