JDM Hatch EJ20 TwinScroll Downpipe required
JDM Hatch EJ20 TwinScroll Downpipe required
My freshly imported JDM hatchback EJ20 is after a long wait, is finally on a ramp getting it's first inspection and having some major works carried out.
It appears my car has a HKS downpipe installed with 2 cats. With the amount of effort/money being invested I would have liked to have a de-cat downpipe. I didn't realise how difficult this would be to source, been on the phone all week without any joy. I can get one fabricated in 2-4 weeks from H&S or similar but just wondering if anyone has one spare lying around that would enable me to get my install completed this week?
Otherwise any expertise on a way around this issue?
My understanding is the 01-07 twinscroll downpipes have a wider bend as it comes off the turbo which would cause fitting issues on my 08 hatch. They are also a little longer which is not a major issue.
Thanks!
It appears my car has a HKS downpipe installed with 2 cats. With the amount of effort/money being invested I would have liked to have a de-cat downpipe. I didn't realise how difficult this would be to source, been on the phone all week without any joy. I can get one fabricated in 2-4 weeks from H&S or similar but just wondering if anyone has one spare lying around that would enable me to get my install completed this week?
Otherwise any expertise on a way around this issue?My understanding is the 01-07 twinscroll downpipes have a wider bend as it comes off the turbo which would cause fitting issues on my 08 hatch. They are also a little longer which is not a major issue.
Thanks!
Scooby Regular
Joined: Oct 2015
Posts: 2,428
Likes: 298
From: Herts
Funnily enough , my sti jdm 2 litre 2008 is finally with me after being imported , and is finally sorted , the hks is a good system and I expect has sports cats fitted already , very little difference between sports cats and a de cat apart from mot time , if it was me I would leave as is , if you choose not too then shout when you have the Hks one off you may have a buyer 👍😁
Hi mate I’d be very wary of HS doing your down pipe, myself and a mate with hatch spec c,s both bought one of them and they didn’t fit, ended up having to them reshaped, was a nitemare Cheers
Cheers - it was last chance request in case there was anything out there. If it doesn't get done in this sitting it will most likely not happen for a while. Especially since I have the same stories regarding poor fitment of HS elsewhere.
How difficult would it be to modify a 01-07 downpipe; anyone tried?
How difficult would it be to modify a 01-07 downpipe; anyone tried?
Scooby Newbie
Joined: Jun 2024
Posts: 2
Likes: 0
From: US
Cheers - it was last chance request in case there was anything out there. If it doesn't get done in this sitting it will most likely not happen for a while. Especially since I have the same stories regarding poor fitment of HS elsewhere.
How difficult would it be to modify a 01-07 downpipe; anyone tried?
Spoiler
Last edited by JeremyRice; Jul 22, 2024 at 07:39 AM.
Scooby Regular
Joined: Oct 2015
Posts: 2,428
Likes: 298
From: Herts
From looking at photos , the bolt holes on a twin scroll down pipe are different from a non twin scroll turbo down pipe , I wonder if the legacy twin scroll down pipe is the same , but as above if it was me stay with what you have 👍
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My freshly imported JDM hatchback EJ20 is after a long wait, is finally on a ramp getting it's first inspection and having some major works carried out.
It appears my car has a HKS downpipe installed with 2 cats. With the amount of effort/money being invested I would have liked to have a de-cat downpipe. I didn't realise how difficult this would be to source, been on the phone all week without any joy. I can get one fabricated in 2-4 weeks from H&S or similar but just wondering if anyone has one spare lying around that would enable me to get my install completed this week? Otherwise any expertise on a way around this issue?
My understanding is the 01-07 twinscroll downpipes have a wider bend as it comes off the turbo which would cause fitting issues on my 08 hatch. They are also a little longer which is not a major issue.
Thanks!
It appears my car has a HKS downpipe installed with 2 cats. With the amount of effort/money being invested I would have liked to have a de-cat downpipe. I didn't realise how difficult this would be to source, been on the phone all week without any joy. I can get one fabricated in 2-4 weeks from H&S or similar but just wondering if anyone has one spare lying around that would enable me to get my install completed this week?
Otherwise any expertise on a way around this issue?My understanding is the 01-07 twinscroll downpipes have a wider bend as it comes off the turbo which would cause fitting issues on my 08 hatch. They are also a little longer which is not a major issue.
Thanks!
Scooby Regular
Joined: Mar 2002
Posts: 6,839
Likes: 427
From: north east
if your planning to use an Impreza STi twinscroll unit then you will also need to swap the headers / up-pipe to suit as they ae different Up and Down turbo flanges on the Legacy twinscrolls......
Scooby Regular
Joined: Mar 2002
Posts: 6,839
Likes: 427
From: north east
the JDM Legacy twinscroll system whilst sharing similarities with the Impreza version does NOT interchange as both the base turbo & d/pipe flanges are specifically different...........
you can convert a Leggy to the larger Impreza set-up but only by swapping the manifold, up-pipe, turbo & d/pipe to suit.........
you can convert a Leggy to the larger Impreza set-up but only by swapping the manifold, up-pipe, turbo & d/pipe to suit.........
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