What are some of the HFC that are close to stock as far as smog/legality?.....I'd appreciate the feedback!....thanks,

 

I was under the impression that all HFCs are legal, and that is the reason people purchase them. I could be wrong.

 

I passed the smog test here in CA with a 3" hi flow cat 272cams and 780 injectors. So the cat must be doing something good.

 

THanks cpoevo,,,,what HFC do u have?....

 

Stock Cats Vs. High Flow Catalytic Converter
Catalytic converters on most production cars are not designed for high performance engines. If you start hot rodding your engine and exhaust, don't forget to upgrade your cat too, since this will be a likely bottleneck. Be sure to check your local emission laws, as sometimes it is only legal to replace a catalytic converter if it is defective or broken. This is why many exhaust companies sell "cat-back" exhaust systems, which is basically the full exhaust from the exit of the cats, to the tailpipes. A good high flow catalytic converter will have an inlet and outlet the same size as the rest of the exhaust pipes to give you maximum airflow.

 

I have a high-flow CAT from Random Tech... it works great. The catalyst is located on wounded layers of metal that have less resistance than the stock ceramic type. It's as close to a straight pipe (CAT-delete) as possible while passing emissions, and your ECU wont through a CEL.

Just keep one thing in mind, high-flow units are louder than stock. So if you have an aftermarket exhaust already, it will only get louder with the high-flow CAT.

Also, some states conduct visual inspections of your CAT, and cops like to give "fix-it tickets", so make sure is comes with a heat shield so it looks similar to the stock one.

For an interesting read on Catalytic Converters... see http://en.wikipedia.org/wiki/Catalytic_converter

 

Does anyone on here have the "Perrin HFC"?....I've been reading that its state legal.

 

the helix high flow cat will probably make the most power

 

Ttt

 

ultimate racing high flow cat......not sure how close it is to stock for smog

 

there are only a few HFC that will pass emissions...and of course, these are the most restricting ones

 

Just make sure you buy, HFC that someone allready passed the emm.test with it.

 

bushur sells an nice one but the tb side is slip fit

 

i have a helix HFC.
threw a CEL with it 5 months after i puting it on.
i was doing a long spirited drive that kept me in the top band of RPMs.
i heard it's the least restrictive HFS on the market. it's metallic (not cyramic). flows 30% better and will outlast any cyramic cat.

on my last car i blew a ceramic cat after 1 1/2 years.

 

Damn talk about waiting until the time is right.
Well, at least we know you're not a tease!
I hope it at least bought you dinner!