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Old 10-28-2009, 12:18 AM   #1
VIsubi
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Member#: 187834
Join Date: Aug 2008
Vehicle:
06 2.5i impreza
Red

Default WRX bolt up exhaust on 2.5i bolt pattern

So since both bolt patterns for both cars are the same I'm looking into an HKS Highpower catback exhaust in the 3'' size(yes I know no bigger than 2.5'') but I'm stocking up now on my parts for turbo kit from AVO and the kit comes with a high flow turbo cat. Is it possible or has anyone done this, to bolt up the catback of that size to the stock 2.5i catverter till I get the kit. I've already ordered my stage 3 SPEC clutch and its on its way..with aluminum flywheel. Other than high flow of exhaust gases this should work out pretty well or should I just go with a stock turbo size of 2.5'' which makes no sense since once the built block comes I'll need that 3'' outlet for flow. let me know what you think or links I've looked found nothing nor anyone that really plans on sticking with a built RS block to do this.
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Old 10-28-2009, 01:04 AM   #2
chazly413
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Chapter/Region: MAIC
Location: College Park, MD
Vehicle:
2005 2.5RS RBP
motec system exhaust-RIP

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Uhh.. maybe a shop could make you an .. expander..? I guess. Or put a flange on the stock cat pipe that would let a 3" fit. An exhaust shop should be able to get this to work is what I'm saying.
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Old 10-28-2009, 01:59 AM   #3
J-Chow
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I'm pretty sure Vizzions on here, bolted up a 3" wrx catback onto his 2.5i
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Old 10-28-2009, 08:11 PM   #4
VIsubi
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Red

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he did any one see any problems running N/A for a short time seems no one can answer this question...hmmm
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Old 10-28-2009, 08:34 PM   #5
chazly413
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motec system exhaust-RIP

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It'll run fine, it's just not optimal. I doubt you'll notice that much of a difference.
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Old 10-28-2009, 10:27 PM   #6
VIsubi
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hmmm cool now to see if a 3'' will bolt up to stock cat since turbo kit comes with high flow cat pointless to buy one also
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Old 10-28-2009, 10:49 PM   #7
chazly413
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motec system exhaust-RIP

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I mean.. you could save some time and money and wait for everything else to come, at least that's what I would do.
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Old 10-29-2009, 02:30 PM   #8
BAN SUVS
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Why don't you just not put the new catback on until you put the turbo kit on? Unless you have to trade away what you already have on there, I don't see why you should bother.
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Old 10-29-2009, 10:59 PM   #9
VIsubi
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Red

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your right was talkin to a friend while we where in the shop building up a S14 about this and I came to the conclussion to just wait...till the kit is bolted and just do it then..
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