Project:B5 Modified Intake Manifold

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:

Project:B5 Modified RS4 Intake Manifold

Project:B5 Modified RS4 Intake Manifold

Project:B5 Modified RS4 Intake Manifold

Project:B5 Modified RS4 Intake Manifold

Project:B5 Modified RS4 Intake Manifold

Project:B5 Modified RS4 Intake Manifold

Driveshaft Heat Shield

With the single piece driveshaft and 3.5″ single exhaust I was finding that the heat shield between the exhaust and driveshaft was in contact with the exhaust, the space is tight between those two main components.

Audi B5 S4 single piece driveshaft and 034 single 3.5" exhaust pipe

I took a hammer and started strategically creating flat spots so that the driveshaft and the exhaust pipe each had some space with clearance to sit within.  I still need to do a test drive to ensure the driveshaft doesn’t rub anything. When I pressed on the heat shield I was getting movement of the heat shield where if it were too close to the driveshaft I’d have expected that there wouldn’t be any movement.  Hopefully that’s a good sign that the clearance is sufficient.

Audi B5 S4 driveshaft heat shield