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Want to modify the cat.
My 94 LT1 y pipe/cat was replaced a few thousand miles ago and is now rattling from the inside. I am thinking about opening up the cat from the top, removing the guts and welding it back shut. It also has a new magnaflow cat back system on it. Will this mod have a negitive effect on performance. Back pressure issues ect... When my original muffler went bad the car really ran like crap!! Engine is stock except for K/N cold air intake. Thanks Steve
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