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2004 JDM STI Impreza - Catted TS Downpipe Recommendations

Old 17 May 2016, 12:10 PM
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Neil_M
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Default 2004 JDM STI Impreza - Catted TS Downpipe Recommendations

Hi Folks,

I have recently purchased a 2004 JDM WRX STI (twin scroll).

It currently has an HKS Hi Power exhaust (rear and middle sections).

I would like to finish off the exhaust system with a catted downpipe (saving any MOT / emissions / noise issues).

Any recommendations on what downpipe to go for?

From searching the Milltek seems to be of poor quality. Hayward and Scott are an option, they have just requested I measure the centre pipe in a straight line. Keeping the system matched with all HKS does appeal, but it seems the partially divorced HKS downpipe has a few restrictions in its mouth.

Thanks in advance,
Neil

Last edited by Neil_M; 17 May 2016 at 12:31 PM.
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Old 17 May 2016, 12:12 PM
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Using a cobra 200 cell MOT friendly sports cat on one of my cars for the last 6 years. No problems.
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Old 17 May 2016, 12:14 PM
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Cheers . I'm hoping to get a downpipe / sports cat combo .
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Old 17 May 2016, 12:16 PM
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Yep, that's what I've got on mine.
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Old 17 May 2016, 12:21 PM
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Just had a look on their site, no sign of one for the Twin Scroll, unless I'm being blonde...
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Old 17 May 2016, 12:28 PM
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You could be right actually, hadn't clocked yours is a twin scroll.


Give them a ring, they are very helpful indeed.
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Old 17 May 2016, 12:32 PM
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Cheers batman, I may well do that to see what they say.
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Old 17 May 2016, 12:52 PM
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Looking at it you don't have a lot of options for twin scroll.


Cobra didn't do one in 2010, but you never know.


I think Tomei do one too.
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Old 17 May 2016, 01:00 PM
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A bit of information for you SC46 twin scroll turbo, 1000cc injectors, RCM downpipe no cat, mapped correctly no problem getting through test in N.I.
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Old 17 May 2016, 01:36 PM
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Originally Posted by BrownPantsRacing View Post
Looking at it you don't have a lot of options for twin scroll.


Cobra didn't do one in 2010, but you never know.


I think Tomei do one too.
Cheers I will check out Tomei.

Originally Posted by 1509joe View Post
A bit of information for you SC46 twin scroll turbo, 1000cc injectors, RCM downpipe no cat, mapped correctly no problem getting through test in N.I.
Cheers for the reply Joe. Who done the mapping?
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