57in) Butterfly Style Zero-Offset Valve

Spherical bearing in use

Engine will be 3mm higher

All the metal components on E90 rear suspension are from high strenght steel

BOV Pro Port GenV Purple Nuts 57in) Butterfly Style Zero-Offset ValveProPort by Turbosmart is an All New 54mm (2. 13in) Blow Off Valve with a tiny footprint and massive flow. The ProPort flows 420 cfm which is enough for 3500 HP and is in a league of its own standing 30mm (1. 2in) lower than PowerPort while flowing over 25% more than the Market leading 50mm Raceport. Features include our unique locking collar design, new unique vent profile, sensor cap option and spring options for all turbocharged and supercharged