Pre Order MAD Exhaust Valve Controller Essential bolt capture It is a convenience option

It is a convenience option that removes the need for using a laptop in the car when using bootmod3's features

2021+ BMW M4 Convertible G83

 The coolant tank level sensor extension harness is perfect for those running a relocated coolant reservoir tank or 335D coolant reservoir

Sold as a kit with 10 bolts

Pre Order MAD Exhaust Valve Controller Essential bolt capture It is a convenience optionMAD Valve Controller Essentials Everything You Need. Total Control. No Guesswork. Take full control of your exhaust sound with the MAD Valve Controller Essentials a simplified, plug and play solution designed around the valve positions enthusiasts use most every day. Unlike the factory system, which constantly opens and closes the exhaust valves based on drive mode, throttle input, and emissions requirements, the MAD Valve Controller lets you lock the