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High-Flow Cats Discussion - HFC

Hello all, I am wondering why people buy HFC or Test pipes . When dealing with the smell of unburnt fuel, CEL, and emission testing... It seems about $600 for

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View Poll Results: The exhaust I am currently running...
OEM Cats + OEM Cat-Back 10 9.09%
OEM Cats + Other Cat-Back 24 21.82%
HFC + Other Cat-Back 57 51.82%
Test Pipes + Cat-Back 19 17.27%
Voters: 110. You may not vote on this poll

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Old 04-11-2012, 04:55 PM   #1 (permalink)
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Question High-Flow Cats Discussion - HFC

Hello all,

I am wondering why people buy HFC or Test pipes. When dealing with the smell of unburnt fuel, CEL, and emission testing... It seems about $600 for 5hp... correct me if i'm wrong, but it seems like $$ could be better spent.

...or is it just a matter of getting every last drop of HP from the car. I thought a Cat-Back exhaust pretty much got all the gains that could be had via exhaust.

VOTE IF YOU READ THIS

Thanks all,
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Last edited by osbornsm; 04-17-2012 at 10:13 AM.
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Old 04-11-2012, 04:56 PM   #2 (permalink)
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The cats are most restrictive part of the whole exhaust system.
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Old 04-11-2012, 04:58 PM   #3 (permalink)
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Quote:
Originally Posted by LakeShow View Post
The cats are most restrictive part of the whole exhaust system.
But dollar-to-dyno... doesn't seem worth it??
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Old 04-11-2012, 05:36 PM   #4 (permalink)
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I like TP's for many reason. I'm more of the hard core enthusiast first of all. But TP's for me are cheaper, lighter, more flowing, great sound (IMO), love the smell of raw fumes, and I don't have emissions.
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Old 04-11-2012, 05:38 PM   #5 (permalink)
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In addition to the benefit of opening up the air flow, the sound is also more aggressive sounding and for me that was what I wanted. I have no issues with the smell of fumes. Never had a problem passing emissions, since no CELs are on it. Here they won't sniff test it unless you show having thrown a CEL(s).
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Old 04-11-2012, 06:42 PM   #6 (permalink)
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Berk HFC's and ARK CBE's. No raw fuel smell and sounds good too.
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Old 04-12-2012, 02:17 AM   #7 (permalink)
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I felt the most gains when I installed the ART pipes. Well worth it IMO.
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Old 04-12-2012, 02:12 PM   #8 (permalink)
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I felt the most gains when I installed the ART pipes. Well worth it IMO.
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Old 04-13-2012, 11:09 AM   #9 (permalink)
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Oh come ON... 200 views and only 24 votes
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Old 04-13-2012, 01:08 PM   #10 (permalink)
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Originally Posted by ZCarMan View Post
In addition to the benefit of opening up the air flow, the sound is also more aggressive sounding and for me that was what I wanted. I have no issues with the smell of fumes. Never had a problem passing emissions, since no CELs are on it. Here they won't sniff test it unless you show having thrown a CEL(s).
Jon, do you have test pipes? Your exhaust sounds awesome.
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Old 04-13-2012, 05:56 PM   #11 (permalink)
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Oh come ON... 200 views and only 24 votes
It also plays a big role if you are FI or NA
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Old 04-13-2012, 07:12 PM   #12 (permalink)
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It also plays a big role if you are FI or NA
Oh really. Hehe
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Old 04-13-2012, 07:25 PM   #13 (permalink)
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Oh really. Hehe
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Old 05-15-2014, 09:31 AM   #14 (permalink)
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I'm stationed over In KY/TN and have my car registered in TN where they don't do emissions. Do any of you know if VA has emission tests? (sniff, visual, or w/e) Thanks.
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Old 05-15-2014, 09:51 AM   #15 (permalink)
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I did all the standard bolt-on (intake, CBE, HFCs) mods prior to going FI. The HFCs were by far the best (most gains) of the bolt-on mods.
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