I have seen people knock the guts out and weld a pipe straight through the stock cats, but that was only needed when the system was put through an inspection process. My take is if you feel that you can get by with it, go for it. I have the off road set up with the 2-chambers and they do sound good! To me it's definitely worth it!!! Just my .02
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John Welch
86 GT, 3.73's, H-pipe, No smog pump, pulleys, K&N, and still going.
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