Question about downpipes...

[turbotitan]

I was wondering if there are any 3" downpipes available that eliminate the catalytic converter? If not, which downpipe and high-flow cat are the best?

 

[nholley]

You can get a straight pipe that will eliminate the cat.

http://www.extrememotorsports.com

 

[BryanK]

the apexi N1 downpipe eliminates the cat, otherwise you can get a testpipe.

 

[turbotitan]

Ok great, thanks for the help. Just wondering, is it really necessary to replace the O2 housing with a higher flowing one? If so, what is a good one that will bolt up to the Apex N1 downpipe? And is the HKS Hiper exhaust a good one to get? I'm looking for one that has a deep sound, not a Honda buzz.

 

[swordfish]

Instead of replacing the 02 housing you can port it out to the size of the DP gasket.

Jeff

 

[EclipsingU]

If you want a good sound. I like the way the Thermal cat back sounds. Nice n mellow.

As stated above dont buy a new o2 housing just port your old one out. As well as the turbo housing and the collector on the exhaust manifold.

 

[doug]

Or instead of porting your O2 housing, since you're getting a new downpipe, you could get what's called an "O2 Eliminator" downpipe-- it's the O2 housing and downpipe all in one piece. It usually flows better than even a ported O2 housing. You can get them from DSM Performance, Hahn, or RnR, just to name a few.