Grail Automotive BMW Exhaust Valve Controller

This BMW exhaust valve controller from Grail Automotive allows you to take full control of your vehicle’s exhaust system. Grail understands the frustration of BMW’s factory exhaust valve settings. Want your valves to stay wide open constantly? This is your solution!

Works with factory BMW exhaust valves.

PRODUCT SPECIFICATION

– No additional wiring is required
– Plug & play to original valves
– Increase valve opening operation to 100%

Two settings:
1) Open valve to full
2) Operate as per OEM operation

COMPATIBILITY

– BMW F20/F21 1 Series
– BMW F22/23 2 Series
– BMW F10 M5
– BMW F30/F31/F34 3 Series
– BMW F32/33/36 4 Series
– BMW F40/F70 1 Series
– BMW F80 M3
– BMW F82/83 M4
– BMW F87 M3
– BMW F90 M5
– BMW F09 M6
– BMW G20/G21/G28 3 Series
– BMW G22/G23/G26 4 Series
– BMW G29 Z4 Roadster
– BMW G80 M3
– BMW G82/G83 M4
– Toyota A90 Supra Mk5

DISCLAIMER

We do not recommend keeping your valves permanently closed. The restriction of airflow, especially under hard acceleration, may cause damage to your vehicle over time.