765LT ECU Tune

Product Description

The 765LT is the most powerful Longtail McLaren has ever built, and it's carrying real history on its shoulders: a lineage that runs back to the F1 GTR Longtail race cars and, in modern road-car form, through the 675LT and 600LT before it. Built from the 720S, it takes the same factory-tuned M840T V8 all the way to 765PS, the number it's named after, while shedding weight and adding aerodynamics that McLaren says produce 25 percent more downforce than a standard 720S. McLaren built exactly 765 coupes worldwide, which makes this as much a numbered piece of McLaren history as it is a performance variant.

Weistec's calibration for the 765LT recalibrates that factory M840T software. It's built to extend what McLaren already engineered into this car, not compete with it. Every factory protection, from knock detection to thermal management to OEM diagnostic behavior, is preserved as-is. Delivered with OEM-level calibration rigor, it moves this 765LT from a factory 755 hp and 590 lb-ft to 952 hp and 720 lb-ft, taking the most extreme Longtail McLaren has ever built and finding even more in it.