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12secondv6, craig picked up almost 2 mph of trap speed from the 1cat and related programming. so it does help a lot. at idle/cruise craigs car is not that bad. he has stock tubular manifolds, stock y-pipe, bullet, magnaflow cat back. it does sound like complete ass when he floors it.
brando, the bullet muffler has slip fits on each end. you have to cut out the cat and a little stock tubing to make space for it. the cat in and the bullet are both 3inch ID tubing, so you have to put a short piece of 3inch OD tubing in between as a coupler.
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