i'm not familiar with the american market on hi-flow cats, but what do people prefer? is there any particular cat that stands out from all the brands that are available?

 

I have a random technologies cat and i LOVE it. Its more expencive but i love it.

 

Bones Hi flow cat from rx7.com is a very good one.

 

I've done some reading (as hf cat will be my next mod) and most people seem to prefer the Bonez one. Good quality good flow.

-Andy

 

The Bonez cat from rx7.com is very nice. I enjoyed it while I ran it.

 

while we are on the Bonez hi flo cat...does it cause boost creep?

 

I have an Australian SMB bolt on high flow cat if anyone wants it.

 

No

 

Thanks.

does it make car gain any additional boost ( I would think because it's less restrictive than stock cat but just want to hear from someone that know for sure).

 

Magnaflow just came out with a direct fit catalytic converter. I believe it is supposed to be better flow than the oem unit and it is oem diameter pipe. I saw one on EBAY for about $80.00 shipped.

Other than what Ive mentioned, I dont know anything else about it. Perhaps someone on the forum has tried one and has performance info.

-chuck

 

*NOTE*

Jeff is only saying that because he loves the sound of my car and knowing i have a bonez cat

 

complete crap... trust me. thier mesh bullshit that does not stand up to the heat of our rotaries. i think my screen door does just as much as thier cat for catalyzing the hydrocarbons

 

Oh yea thats a good point, when buying a high flow cat you need to get one that can withstand the higher temperatures of rotary exhaust.

-Andy

 

I have a Pettit. Don't know much about it but it works fine after 2+ years. . .what is the word on Pettit hi-flow if anyone knows?

 

Even the Hi-flow cats tend to offer enough restriction that creep isn't an issue. Would you see a performance gain over an old stocker? Yes. But I think it would more likely show up as quicker spooling/response, better gas mileage, longer turbo life, lower operating and underhood temps and cleaner emissions.

+1 for Bonez.

 

I am thinking of getting the bonez cat. do they have a CARB number for use in california?

Jeff

 

I believe RX7store's cat midpipes use the magnaflow converter. I don't believe to many people have complained about theirs.

 

X2...RP is 15 minutes from my house :-)

 

Yes they do.

 

I have been running a Bonez for close to one year now and just passed smog with ease last week. From what I read, the Bonez cat is made for the rotary engine which has been known to distroy aftermarket cats quickly.

 

what... are you sure?

 

dido, i think rx7.com got it right. i love mine to death and it reduces hydrocarbons pretty well. i am a tree hugger so i love this earth

 

Yes. You can search the West forum for more info. It seems they became CARB legal around 2000 or so.

 

I had a good experience with the Random Technologies high-flow. Lasted almost 7 years.

 

You don't need a carb number for hi-flow cats on non OBD-II cars.