Quote:
Originally Posted by TMF Lindbeck
Then again cats and hi performance don't really go hand in hand.
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Somebody should let the LS7 know about this so it can tone itself down a little.
To the OP, for a 350 or 383 you're not going to see a huge difference between 3" or 2.5" exhaust off the cats as long as it's quality mandrel-bent exhaust. There's many much bigger and meaner engines out there making due with a dual 2.5" system.