The final part of the induction system for modification is the plenum chamber and throttle body. In this modification we port the throttle body out
to 72mm and fit a 72mm butterfly. This allows extra air into the system and prevents any back pressure, which would hold back the performance gains from
the other induction system modifications. It is important to note that there are many variants of the plenum chamber and throttle linkage, so it is best to
have your own plenum modified, but if you do not have one, then please ask for details of what is available.