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Originally Posted by blowin 4  hey john are you running a cat i have mine on its aftermarket with 3'' pipe i was told it would max at 500 hp was thinking of removing it only if it would make a difference. |
No I run 3" mandrel bent through 2 - 3" resonators then in a 2 chamber 3" Flowmaster. You might see something by removing it but your car will be 1/3 louder and you won't be legal so it really isn't worth it. Down here they don't care if you have a cat or not so we don't run them, where you live I think it is a big deal.
If your worried about it on a street car install one of those 3" boost dump valves before the cat. Those will open under boost allowing 3" dump right after the turbo so you only have open exhaust under boost, pretty neat product...