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Old 11-07-06, 04:30 PM   #1
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hi-flow cats
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?
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Old 11-07-06, 04:53 PM   #2
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I have a random technologies cat and i LOVE it. Its more expencive but i love it.
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Old 11-07-06, 04:58 PM   #3
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Bones Hi flow cat from rx7.com is a very good one.
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Old 11-07-06, 05:24 PM   #4
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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
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Old 11-07-06, 05:50 PM   #5
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The Bonez cat from rx7.com is very nice. I enjoyed it while I ran it.
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Old 11-07-06, 06:46 PM   #6
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while we are on the Bonez hi flo cat...does it cause boost creep?
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Old 11-07-06, 06:47 PM   #7
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I have an Australian SMB bolt on high flow cat if anyone wants it.
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Old 11-07-06, 07:20 PM   #8
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Quote:
Originally Posted by tphan
while we are on the Bonez hi flo cat...does it cause boost creep?
No
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Old 11-07-06, 07:44 PM   #9
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Originally Posted by Mahjik
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).
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Old 11-07-06, 07:47 PM   #10
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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
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Old 11-07-06, 08:04 PM   #11
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Quote:
Originally Posted by TRISPEEDFD3S
Bones Hi flow cat from rx7.com is a very good one.
*NOTE*

Jeff is only saying that because he loves the sound of my car and knowing i have a bonez cat
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Old 11-07-06, 08:09 PM   #12
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Originally Posted by a3dcadman
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
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
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Old 11-07-06, 09:25 PM   #13
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Quote:
Originally Posted by Davin
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
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Old 11-07-06, 11:02 PM   #14
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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?
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Old 11-07-06, 11:24 PM   #15
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Quote:
Originally Posted by tphan
.......does it make car gain any additional boost ( I would think because it's less restrictive than stock cat.....
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.
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Old 11-08-06, 12:53 AM   #16
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I am thinking of getting the bonez cat. do they have a CARB number for use in california?

Jeff
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Old 11-08-06, 06:01 AM   #17
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Quote:
Originally Posted by Davin
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
I believe RX7store's cat midpipes use the magnaflow converter. I don't believe to many people have complained about theirs.
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Old 11-08-06, 09:08 AM   #18
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Quote:
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I am thinking of getting the bonez cat. do they have a CARB number for use in california?

Jeff
X2...RP is 15 minutes from my house :-)
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Old 11-08-06, 09:13 AM   #19
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Quote:
Originally Posted by jeff p
I am thinking of getting the bonez cat. do they have a CARB number for use in california?

Jeff
Yes they do.
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Old 11-08-06, 09:41 AM   #20
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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.
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Old 11-08-06, 10:46 AM   #21
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Yes they do.
what... are you sure?
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Old 11-08-06, 10:48 AM   #22
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Quote:
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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.
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
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Old 11-08-06, 11:12 AM   #23
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Quote:
Originally Posted by Davin
what... are you sure?
Yes. You can search the West forum for more info. It seems they became CARB legal around 2000 or so.
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Old 11-08-06, 12:08 PM   #24
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I had a good experience with the Random Technologies high-flow. Lasted almost 7 years.
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Old 11-08-06, 12:15 PM   #25
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You don't need a carb number for hi-flow cats on non OBD-II cars.
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Old 11-08-06, 12:15 PM
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