WRX manifolds

Author
Discussion

Flat over crest

Original Poster:

4 posts

64 months

Monday 18th May 2020
quotequote all
Has anyone fitted a Japspeed stainless steel manifold? This particular item requires some minor sub frame modifications according to the information and I wondered if anyone had any details to share.

Others are available but are three to four times the price; appreciate the 'get what you pay for' thoughts, which I agree with mostly, just trying to balance mild upgrade costs with a relatively low value car that I'm hoping to maintain.

Thanks


TEKNOPUG

19,342 posts

212 months

Monday 18th May 2020
quotequote all
What benefit are you hoping to get from the Japspeed exhaust?

Flat over crest

Original Poster:

4 posts

64 months

Tuesday 19th May 2020
quotequote all
A mix of things really. Replacing an ageing item that has a leak and blowing from somewhere. Intend to keep the car long term so happy to invest on maintenance and upgrades that help that long term view.

Potential for minor performance gain which is a secondary consideration and a bonus should that be the case.

Appreciate the interest, do you know of any other options? I am keeping an eye out for second hand stainless steel manifolds but in passing, not by concerted effort.


TEKNOPUG

19,342 posts

212 months

Tuesday 19th May 2020
quotequote all
Standard cast manifolds, ported matched and then Ceramic coated, Thermo Met or wrapped would be my advice, unless you are looking for equal length items?

Pupbelly

1,413 posts

136 months

Wednesday 20th May 2020
quotequote all
If it’s a long term car just invest in a stainless manifold that fits properly without having to faff around doing structural modifications. It’s clearly not right if they can’t design it to fit the original cars dimensions.

Flat over crest

Original Poster:

4 posts

64 months

Wednesday 20th May 2020
quotequote all
Thank you gentlemen, a good suggestion and a good point to consider.

Much appreciated

P13cur

58 posts

72 months

Thursday 21st May 2020
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My old wrx had one of these fitted it sounded sh*t so.i removed it and installed a standard mani with roger clark up pipe .. it sounded far better and was alot more responsive tbh

untakenname

5,052 posts

199 months

Friday 22nd May 2020
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Had a Toyo/Japspeed manifold on another car and the surface needed to be machined as it wasn't flat, ended up costing more to fit than a decent one would have cost that had proper tolerances.

uncleluck

484 posts

58 months

Wednesday 27th May 2020
quotequote all
Echo the above about original parts.

What year is the car? I’ve just been through the leaking exhaust (before the turbo) on my 2002 WRX and turned out the up-pipe had broken at the welds and was leaking between its two skins.

If it’s a newer WRX with an up-pipe cat I’d find a decat sti or earlier WRX up-pipe ready for the job. If you’re wanting you do something modification-wise I’d do as mentioned above and port the stock headers.

Forget aftermarket stuff IMO and best action would be to do as mentioned above, get yourself stock parts, port them and ceramic coat them.


Flat over crest

Original Poster:

4 posts

64 months

Wednesday 27th May 2020
quotequote all
Thank you to the last trio of respondents also.

It has helped to get a plan into place. I do need to get some research done as I have yet to see even a standard manifold. Perhaps I'm looking in the wrong place. For porting is anyone aware of a business that offers the service in the south coast area close to Portsmouth.

I'll have a search around too. Cheers