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Okay folks...  what is the consensus numbers on what a good set of 1 3/4” primary long tubes (Kooks, ARH, etc) will get you on an basically (maybe a CAI and a cat back) stock L83?  Info/numbers on catted vs non-catted would be cool too.  So would before and after tuning...  even though it’s pretty much a given that you need a tune if you do long tubes.  Thanks y’all!

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I dont have specific numbers to give you, but the consensus with long tubes, catted or not, and a good tune, (obivously intake, and exhaust) would net you about 25-30hp and 25-30 tq.

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