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Originally Posted by i want a dirtybird
im a little confused...with an SLP loudmouth is a SLP Y pipe needed (for sound reasons not HP gains) and should i get 2 high flow cats too? or dont even bother with different cats? i need help
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Changing the Y pipe by itself and/or the cats won't make any negligable change in the sound or performance unless your just deleting the cats altogether. Just a waste of money. The stock cats flow pretty good actually. If you wanna do the y pipe get some long tube headers at the same time.
