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Hey guys. I would like to do a cat back exhaust system for gmc sierra, i like magnaflow because I grew up around them but I was wondering what exhaust system would give me the most performance without killing the bank account. I would like to do an x pipe or h pipe but I don't know which would be better, which would mean dual pipes. Is there more performance gain from single or dual? H or x pipe? I already have Cai and tuner diablo sport intune. After I get my exhaust done I'll get with lew to get a custom tune Done. I like a deep rumble but not to loud because I don't want to wake neighbors. What do you all think would be best performance wise?
Please help me out with this, thanks in advance.
 
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