675LT ECU Tune
$2,999.00
Product Description
The 675LT brought back a badge McLaren had left untouched since the F1 GTR "Longtail" race cars tore up circuits, and it earned the right to wear it. This was the lightweight, aero-obsessed Longtail philosophy translated into a modern road car for the first time, and true to McLaren's naming convention, the number in its name comes straight from what the engine actually made: 675PS, extracted from the familiar M838T V8 but paired with real weight savings, an extended tail section, and far more aggressive aerodynamics than the 650S it was built from. McLaren built it in limited numbers and pointed it squarely at the driver, not the commute.
Weistec's ECU calibration for the 675LT stays entirely within that factory M838T software architecture, recalibrating what McLaren already engineered. Every one of the factory's protections, knock control, thermal management, OEM diagnostics, remains active and untouched. Built to OEM-level standards, this calibration takes the 675LT from a factory 666 hp and 515 lb-ft to 730 hp and 652 lb-ft, giving a car built purely for the driver an even sharper edge to work with.