only negative things, is on an I4, you'll loose torque and a few ponies, but on the V6s, you gain a few ponies instead. i'm sure you're loving the loud sound right now, it's addicting, just did it on my bronco. the only bad thing i know of for cutting off your muffler is cops tend to pay attention more often, and some smog places refuse to test you, even though it's nothing illegal at all, and doesn't affect your smog one bit.
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