Uprated Rooster Racing Bypass Valve The Rooster Racing uprated bypass

The Rooster Racing uprated bypass valve is made by using new aftermarket units

It is a pretty much neglected part

Now Mini did try an ECU tweak on the later models but even that is not going to work

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

Uprated Rooster Racing Bypass Valve The Rooster Racing uprated bypassThe 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