HF Cat vs Test pipes on my new Z

SurfDog

Especially about the "rasp" go resonated!
HFCs are not to bad, but the TP smell doesn't bother me at all.

I finally took off my BERK HFCs because the Connection flanges warped from the heat, (which is a fairly common problem I hear). It caused the CELs to come on a lot and smelled way worse than TPs because the exhaust was leaking right under my seat ( I do track some, so your results may vary)

TPs cause less "back pressure" in the exhaust. It lowers your torque a bit, and enhances HP a lot, but it also takes pressure off the exhaust corridor releasing heat better and solving annoying leaks. (at least it did for me)

IMHO, its a very good mod if you push your car like I do. HFCs eventually were very problematic for me and talk about smell!

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09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix

LAVA

I have some TP's for sale, check my sig

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