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Re: Eliminate pre-cat sections. Bad idea?
I will plan to do 2" off the headers, including the O2 sensors. Then into AeroTurbine AR20 resonators, with more 2" into the main cat. What diameter pipe comes off the main cat headed towards the resonator before the muffler? I would need a Main Cat with that diameter single outlet, and the 2" inlets. Any model suggestions? Is there an O2 sensor on the Main Cat, giving our cars 3 of them? Thanks!
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