Downpipe - Subaru WRX Forum
 
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post #1 of 9 Old 03-09-2005, 06:23 PM Thread Starter
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Question Downpipe

Im looking to get a downpipe pretty soon and i was thinking of getting the Helix (Stainless) - US Spec - 02+, but i wanted to know what else I need to make fit with my stock exaust... thanks
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post #2 of 9 Old 03-09-2005, 06:57 PM
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You shouldn't need anything. It fits like the factory part.
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post #3 of 9 Old 03-09-2005, 09:12 PM
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I have this pipe on my car. Originaly with the stock cat-back. The two flange types are slightly different which can cause leaks at the cat-back connection. All you need is a little bit of silicon gasket sealer, which you can get at any hardware store, and put a bead of it on the gasket and it seals it right up. The helix DP is a great buy.
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post #4 of 9 Old 03-09-2005, 09:24 PM
 
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Get new gaskets too.
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post #5 of 9 Old 03-10-2005, 12:37 AM
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Quote:
Originally Posted by IBAUCLAPlaya
Get new gaskets too.
^^ always a good idea I have no experience with that downpipe, but from I've heard quite a few on the market mate with the stock catback just fine.
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post #6 of 9 Old 03-10-2005, 08:07 AM
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You need to find an O2 sensor wrench or a 22mm socket to remove your O2 sensor.
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post #7 of 9 Old 03-13-2005, 04:41 AM
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Hey guys, what u think of putting in just a open downpipe in my STi without the cat-back? It will save me 500+ dollars. Reason i'm asking is because i saw it on a SRT-4 the other day and it sound really concervative at idle, nice and deep when on throttle but not too loud. There is also no highway drone, but once you let it rip, it sounds just like a .50 cal anti aircraft gun. So i wonder how it will be if i did that to the STi.
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post #8 of 9 Old 03-13-2005, 05:22 AM
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Take 10 mins, drop your catback, fire up the car. I think you'll have the answer pretty quick.

My guess is "WHAAAAAT??? I SAID IT'S TOO LOUD!!!"

FP Green'd 04 STi

Trevor
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post #9 of 9 Old 03-13-2005, 07:52 AM
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I have an open downpipe with no cats at this point on my car. The stock downpipe wasn't to loud at idle, but the TXS downpipe is VERY loud at just idle. At WOT with the windows up you can barely hear anything else, I couldn't even hear my HKS SSQV anymore over the exhaust. Its cool to do for a while, but I would never do it permanitly.
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