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Originally Posted by NJSPEEDER
actually the cat is about 5times as restritive as a muffler.
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Wrong Tim. How many times do we have to discuss this! High flow cats flow just as well if not better than most mufflers. If you have a stock cat or a clogged cat or a damaged cat, then you'll see gains by removing it. If you put a high flow cat in it's place, you will still see gains. Craig probably saw his gains because his cat was not working properly.