McLaren JB4 Performance Tuner for M838T Engines (BETA) vw-tiguan-r-2021--esr5182716 18MM and 20mm spacers might

18MM and 20mm spacers might require slight inner fender rolling on the rear of some BMW E chassis vehicles

the JB4 includes a fully programmable CANbus system

75" exhaust tips are the perfect choice for dressing up your factory M exhaust outlets

5T (8J / MK2) - Global Market

5' E61 LCI (11/2005 — 05/2010)

McLaren JB4 Performance Tuner for M838T Engines (BETA) vw-tiguan-r-2021--esr5182716 18MM and 20mm spacers mightInstant Horsepower and Torque Gains The JB4 is a plug and play McLaren tuner that plugs into easy to access sensors in the engine bay and works with your factory ECU tuning to remap your boost, timing, and fueling for optimal performance and reduced turbo lag. It features a 64mhz processor allowing sensors to be sampled 800 times per second using dedicated 10 bit digital to analog converters, ensuring smooth and powerful performance. No ECU flash