The 3" downpipe on the SD headers is much larger than the stock cat pipe. You won't be able to match them up without using a reducer. You're better off saving a little bit longer and getting the money on a high flow 3" cat.
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09-18-2010
The 3" downpipe on the SD headers is much larger than the stock cat pipe. You won't be able to match them up without using a reducer. You're better off saving a little bit longer and getting the money on a high flow 3" cat.
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