![Fabspeed XperTune Performance Software for McLaren 650S [FS.MCL.650S.ECU]](https://diamondusedparts.com/wp-content/uploads/2026/04/fabspeed-xpertune-performance-software-for-mclaren-650s-fsmcl650secu.jpg)
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Fabspeed XperTune for the McLaren 650S refines sensor strategies, air/fuel targets, and boost control to increase horsepower, torque, and drivability without compromising reliability. On the dyno it showed gains of 33whp and 44ft-lbs at 4000 rpm, with maps available for stock cars or builds with Sport Cats, bypass pipes, exhausts, or upgraded turbos.
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