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Old 08-17-2005, 10:32 AM   #1
kevin2.5rs
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Default Helix downpipe or cobb downpipe?

Im looking for a bellmouth downpipe with a high flow cat.
I have narrowed it down to either cobb or a helix.
To the main question, Does the location of the highflow cat make
any difference in power/ or delivery of the power.
Helix cat is 4" from the turbo as cobbs is 4 feet from the turbo
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Old 08-17-2005, 10:34 AM   #2
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No. It's like Coke and Pepsi, same thing with .001% difference. Go with what you prefer and don't look back.
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Old 08-17-2005, 12:28 PM   #3
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Cobb says more restriction further from turbo as possible , But I really don't think it would matter in this case, helix makes good stuff
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Old 08-17-2005, 01:24 PM   #4
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FYI the helix downpipe uses a flat flange for most aftermarket catbacks and the cobb uses a donut style flange for OEM catbacks. Make sure whatever catback you are usings or plan on using works with the downpipe you buy.
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Old 08-17-2005, 01:25 PM   #5
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Good point
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Old 08-17-2005, 01:51 PM   #6
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Does that mean the helix won't bolt up to the stock catback?
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Old 08-17-2005, 02:03 PM   #7
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no it will, i got mine to mate up, you'll just need some extra gaskets.

They're both very nice pieces, if you plan on running a WB setup make sure you get the latest HELIX, the earlier versions only have on bung far back for the stocker sensor, all cobb units have two.
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Old 08-17-2005, 02:20 PM   #8
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WB setup?
I have a spt CB & AP now
And a bosal up-pipe sitting in my garage waiting for a dn-pipe
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Old 08-17-2005, 02:21 PM   #9
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i ran a catted helix dp with stock catback for 7000 miles. if you use 2 gaskets it should be fine, although i think there will always be a tiny bit of exhaust leak there. my gaskets we're pretty crusty when i switched to a borla catback so i know there was a bit of a leak. never anything that could be heard or felt.
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Old 08-17-2005, 02:24 PM   #10
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im running a catless helix downpipe, and i love it! it's been on for a good 25k miles now i think
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Old 08-17-2005, 02:26 PM   #11
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Helix is awesome !!
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Old 08-17-2005, 03:01 PM   #12
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WB= wide band, in which you would need the bung closest to your turbo, which the latest helix pipes and cobb pipes have, but not the earlier helix pipes (v1 maybe?).
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Old 08-17-2005, 03:03 PM   #13
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For the bang for the buck, we would suggest Helix

Thanks
Preston
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Old 08-17-2005, 03:59 PM   #14
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Quote:
Originally Posted by hondaeater69
WB= wide band, in which you would need the bung closest to your turbo, which the latest helix pipes and cobb pipes have, but not the earlier helix pipes (v1 maybe?).
Ahh ok so I need a bung close to the turbo if I want to get protuned right.
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Old 08-17-2005, 04:04 PM   #15
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/\, not exactly. If you want to setup your OWN WB setup, you'll need the bung close to the turbo. Many pro tuners use the WB at the end of the tailpipe to tune with.
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