I received a Project:B5 modified RS4 intake manifold that is enroute to a customer.  Shortly I’ll be performing flow testing on the intake manifold similar to what has been done with some other B5 S4 and RS4 intake manifolds.

This particular item lies between two prior RS4 intake manifolds that I have evaluated in terms of modifications.  Previously I tested a stock RS4 intake manifold and also a heavily modified RS4 intake manifold that had the Throttle Body inlet enlarged to accommodate an 80mm throttle body.  The unit I have on hand is more closely related to the RS4 IM with the 80mm TB adapter, this unit also has an enlarged plenum and porting and smoothing, but retains the RS4 throttle body sizing at the IM inlet.

Some pictures of this latest Intake Manifold: