[REPU] Board Post Reply: I passed emissions!

From: forum@mazdarepu.com
Date: Wed Nov 27 2002 - 12:42:39 PST

A New Post has Been made to the thread [I passed emissions!]
User From: Tom93R1
The Reply was:

I wonder how much backpressure a cat really creates? I know that I cannot feel the difference now from when I had no cat but my super cheap muffler is probably so restrictive that anything else added on wouldnt mater. When I finally get around to putting my header on and getting a free flowing muffler would it be worth the effort to have flanges welded onto a cat so that I can still run the cat and swap it for a mid-pipe on demand? Or should I just eliminate the cat entirely and just run the mid-pipe?


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