As stated. Exact fit for 2001 Pontiac Bonneville. Easy installation. However if you are replacing an original Cat you will need to cut the pipe about 14.25" from the front flange and buy 4 bolts and nuts (mine is 4-1 1/4" 1/4"). . 2" diameter 20) you will also need 2-2 1/2" muffler clips to install it. They fit on the hitch that comes with the cat. You just have to push them!
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