Uprated Rooster Racing Bypass Valve This gives sharper throttle response

This gives sharper throttle response and will keep the boost pressure  your supercharger set up makes going into the engine - where it matters

should you have lower operating vacuum due to modified camshafts fitted

It is a physical weakening that can not be rectified electronically

as it is small and not very glamorous looking

Uprated Rooster Racing Bypass Valve This gives sharper throttle responseThe bypass valve is a very important part of the supercharger air flow system. It is a pretty much neglected part, as it is small and not very glamorous looking. However inside the valve is a rubber diaphragm and small conical spring that is vital to its function. Over time the spring weakens and when you change gear or simply close the throttle you may find a slight flutter or hesitation in the engine revs. This is known, in the R53 Mini world as Yo