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Discussion Starter · #1 ·
What is the length of the stock cat from end of flange to end of flange? If your under your Evo with a tape measure, can you help me out? I won't have mine till March, but I've got a test pipe idea. Thanks.
 

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u-r makes a test pipe for the EVO already..... and its no check engine light either..75 bucks.....
 

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Discussion Starter · #3 ·
I'll could do it myself and rig the O2 sensor for $30.
I'm looking to use a BR 2.5 DP, test pipe, and full three inch mandrel piping after that. The test pipe will be a 2.5 to 3.0 transitional cone, but it needs to be the same length as the stock cat so it can be swapped in for smog.

U-R, Unorthedox Racing?
 

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So how long is it? If you get a chance.
The transitional piece I want to use comes in various lenths and tapers. I'd love to fabricate this and have it ready to install.
 

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Discussion Starter · #6 ·
Well, I'm finally gettting around to doing some exhaust work. For anyone interested in making thier own test pipes in the future;
stock cat (end of flange to end of flange) = 18.5 inches
 
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