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      10-24-2010, 04:19 PM   #137
Griz
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Drives: 2010 E92 M3
Join Date: Jul 2008
Location: Crook County, IL

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Quote:
Originally Posted by dieseldub View Post
what about the exhaust manifolds? do they have built in cats?

from what i gather on the diagrams

manifolds>primary cats>secondary cats>x pipe>axle back?

are those resonators on the x pipe?
There are 2 sets of cats in the entire system (both pictured in the diagrams).

For the headers, the RD Sport motor build thread should have some good info: link. If I remember correctly, there were some good picture comparisons between the RD Sport "shorty" headers and stock headers. It's a long thread, but you should find it a good read.

Correct on the resonators, they come after the x-pipe in the 2nd diagram.
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