Re: Hi flow cats or straight pipe... and header ??
Go to summitracing.com and look at the picture to compare for the headers.
As far as the cats, you'll get a check engine light for the missing cats, because you have downstream O2 sensors. Best bet, is to stick with the normal cats..
And if you were to custom fabricate a set of headers, you need a header flange. I have tried to find one for the 3.7L with no luck ANYWHERE..
05 Jeep GC WK, 3.7L, SCT programmer, K&N CAI, FASTMAN ported TB, Flowmaster Super 44 cat-back exhaust (Dumped), HD Bilstien's, 6000K HIDs, 5% Tint ALL the way around, Full Infiniti speaker system with an Alpine HU, TOBY Subwoofer(THE GREATEST), Plasti-diped Rims