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Safely increase your powerband and rev higher by upgrading your valve springs and retainers
stealthy hidden on the rear of the intake pipe
this can be done via any BMW tools but
This serviceable item can be removed and services rather than thrown away like the OEOM filter
In order to properly control the oil temperature on your N54 or N55 engine
Kompact Plumb Back-25mm mk5 Safely increase your powerband andProduct Information Full recirculating BOV. The Plumb Back system recirculates all excess pressure back into the intake system. Great for enthusiasts not wanting to be noticed but wanting the performance and reliability benefits of a quality BOV. Please note; that for twin turbo applications, such as the Audi S4 2. 7L (B5) 97 01, this will require two valves. Supplied With: Green Spring Rated 15 InHg (installed) Product Video Review https: youtu. be