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#1 |
Registered Member
Join Date: Mar 2004
Location: Loveland,Colorado
Posts: 44
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![]() What is up with four cats on my 04 GT. Do these cars have to have a lot of backpressure or what, I have never seen a car with four cats unless its in Cali. Im thinking about getting rid of the stock H pipe from the manifolds to the mufflers and replace it with a offroad X pipe and 2 chamber flows. Any opinions.
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