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Which high flow cat (HFC) is best?

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Which high flow cat (HFC) is best?

 
Old 03-03-2019, 07:08 PM
  #11  
 
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I have the EVS 63. It is fine on my car. Haven't had any issues.

(Only drivetrain mods are K&N intake, EVS HFC and mugen header/catback. I'm not exactly doing anything wild)
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Old 03-03-2019, 10:03 PM
  #12  
 
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Originally Posted by Crab Rangoon View Post
70mm HFC will drone worse than my 70mm test pipe? That's discouraging.
My T1R-70EM single with test pipe had almost no drone, with Berk 70mm HFC it was horrible.
I thought it was pretty common knowledge a cat will make it worse?
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Old 03-04-2019, 01:24 PM
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I went Rockstar and very happy with it
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Old 03-04-2019, 01:58 PM
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Originally Posted by flanders View Post
My T1R-70EM single with test pipe had almost no drone, with Berk 70mm HFC it was horrible.
I thought it was pretty common knowledge a cat will make it worse?
Odd, YMMV I suppose ¯\_(ツ)_/¯ my T1R-70EM is dual rather than single and drone is prominent with TP but tamed by OEM cat. I’ll likely take my chances with the HFC anyhow.
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Old 03-04-2019, 10:54 PM
  #15  
 
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I got a Milltek dual now and there is much less difference with this system but still same tendency with a tiny bit more drone with cat.
Try it and report back
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Old 03-05-2019, 04:07 AM
  #16  
 
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Originally Posted by jackmugen02 View Post
The Berk HFC have been known to fail on race or boosted S2000s. The Rockstar and EVS Tuning HFCs have been proven on these applications. I went with the EVS tuning HFC on both of my S2000's, because the material and build quality was better than Rockstar's. EVS Tuning HFC are made in Taiwan, but Evasive stands by their products and will probably price match the Berk one too. SARD and HKS(I think) make HFCs too, but they are in the $800 range.

A HFC causes more drone than a test pipe? That is the first time I heard that. A test pipe will give you a louder raspy exhaust and a lot more fume smell.
Also yes. The HFC will definitely give you more drone than the TP. TP in general always has the least amount of drone.

I'll also say that Berk has been around a LOT longer than both the EVS and Rockstar options so it's only inevitable there have been more failures. I've had the EVS unit in the past and quality did look high so no real complaint there.
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Old 03-05-2019, 09:20 AM
  #17  
 
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Wish I could use one (I'm in Cali).
Maybe I should find a fabricator who can weld the oem heatshields on for me. (idk if my go-to fabricator in the '90s is still around)
Too lazy to swap back to an oem cat every time smog time comes around.
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Old 03-05-2019, 09:33 AM
  #18  
 
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Looked completely stock under the car when the other half was bolted in place. Welds broke with a chunk of rock kicked up under the car and struck the cat. Running without heatshields ever since.

-- Chuck
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Old 03-05-2019, 10:43 AM
  #19  
 
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Originally Posted by Jah2000 View Post
Wish I could use one (I'm in Cali).
Maybe I should find a fabricator who can weld the oem heatshields on for me. (idk if my go-to fabricator in the '90s is still around)
Too lazy to swap back to an oem cat every time smog time comes around.
I think Ballade used to sell a HFC or TP with tabs. You can also just bolt the heatshield down on the HFC without tabs. Worked for me briefly
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Old 03-05-2019, 11:17 AM
  #20  
 
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Berk is legally 49 state compliant
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