What size engine do you have? Rather than spend the $40+ on a flowmaster, you can get a Cherrybomb Turbo II (not the glass pack) for $15 at Autozone. That's what I have on mine
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"Any man who says he is an American, but something else also, isn't an American at all. We have room for but one flag, the American flag... We have room for but one language here, and that is the English language... and we have room for but one sole loyalty and that is a loyalty to the American people." - Teddy Roosevelt