F8X M3 M4 High Performance Software Tuning E53 We never drop the diameter

We never drop the diameter less than the stock diameter of 80mm

BLUE Line Full Active Autowerke Exhaust: 398 WHP | 401 WTQ

Fill out the Drop Down sheet for BMW Vin #

All this has been in done while maintaining the factory characteristics that BMW engineered this engine/Ecu combination to work with

year-2021-make-bmw

F8X M3 M4 High Performance Software Tuning E53 We never drop the diameterNOTE: FOR ALL BMW CARS MANUFACTURED ON OR AFTER 6 2020, THE ECU IS LOCKED AND CURRENTLY CAN ONLY BE UNLOCKED BY SENDING TO FEMTO DIRECTLY. ONCE THE ECU IS UNLOCKED, WE CAN TUNE AS NORMAL. ***Before your order ships you MUST sign and return the Off Road Use Only Waiver available HERE. Please email, fax or take a photo of the completed form. You can email it to your sales rep or to info@activeautowerke. com and you can fax it to us at (305) 253 8921***