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No special tools required
F26 X4 28i
The upgraded internals handle 22-24 PSI reliably while maintaining the factory turbo's spool characteristics
N55: F10 535i (2011-2016)
Feel the difference immediately: fuel rail pressure holds steady through peak boost instead of falling off at redline
Turbosmart Kompact EM BOV VR9 Dual Port engine-s55 No special tools requiredStock diverter valves leak under pressure and respond like molasses when you need instant boost retention. The Turbosmart Kompact EM BOV VR9 Dual Port delivers pressure relief that's 57 times faster than your eye can blink, giving you the throttle response your BMW's turbo was designed to deliver. Performance Gains Expect immediate improvements in throttle response, especially during rapid gear changes where stock diverter valves create lag between