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Old 11-18-2008, 06:23 AM   #1
WRXbrother
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Default Exhaust Maniflod question.

I've seen people running wrx exhaust manifolds. So i would assume that an Sti exhaust manifold, or any ej exhaust manifold would fit on to any other engine/heads? Would this apply to SOHC engines, like mine?

I know the exhaust portion of it would need fabrication, which is no big deal, my buddy owns a shop.
And I could get my brother's wrx manifold cheap (probably free).

Ps, I have an 08 2.5i and I'm pretty sure it's the exact same as teh 07 2.5i as far as engine goes.
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Old 11-18-2008, 07:15 AM   #2
Storm
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It'll bolt up, but the crossmember is in the way on earlier cars. I don't know how the 08 runs.

If you're looking to turbo the car, I'd have to question trading the car back in for a WRX since it's so new......but to each their own.

Jay Storm
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Old 11-18-2008, 07:25 AM   #3
WRXbrother
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NO, definitly not turboing the car.
Just looking to upgrade to a UEL header and was curious.

I'll be keeping this beast for a while.
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Old 11-18-2008, 07:54 AM   #4
EdHilario
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The car looks clean but the rims look so dirty! Nice Hella lights!
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Old 11-18-2008, 08:23 AM   #5
obs2008
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you can get a uel off ebay for like 200
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Old 11-18-2008, 12:39 PM   #6
mdungelman
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I've got a modified OEM wrx header. There will need to be an O2 sensor bung welded into the header, and one after whatever cat is left. Probably will have to get an 02 sensor extension or extend the wires yourself. The toughest part is modifying the flange. Luckily mine was ready to bolt up when I got it. (Thanks James!)

Whoring my clips:

Stromung Cat-Back.

Before

After
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Old 11-19-2008, 04:16 AM   #7
WRXbrother
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I'll look into the 02 sensors. I don't mind rewiring them if need be. I could have a bung welded in as well, but my buddy hates doing them. I might have to do it myself.

Dirty pic was after a long trip on some Michigan back roads.
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Old 11-19-2008, 04:53 AM   #8
WRXbrother
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Another question. Do you guys with aftermarket headers get CEL's after install?

I would assume I would get a 02 sensor CEL.
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Old 11-19-2008, 11:46 AM   #9
Back Road Runner
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You will lose power stepping to a turbo manifold. You'll need to do a bit of work to even use them. The best option is to pretty much stay stock. I don't know of the OBX header will fit the new cars. If it does, that's basically your only upgrade option that will actually produce more power. Because the stock manifold is EL and better flowing then old variants, the Borla UEL is more of a side step now. You can get a burble but basically no more power.

About all you do now is just do a manifold back upgrade, swapping in a high flow cat and muffler.

Beyond that, you're looking at cams, head work, high compression pistons, things like that. The ECU is also a place to gain power and modify the engine behavior, but I don't know how many folks have actually started tuning the newer cars, if they are that different and how much.
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Old 11-19-2008, 11:46 AM   #10
Qman
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Quote:
Originally Posted by WRXbrother View Post
NO, definitly not turboing the car.
Just looking to change to a UEL header and was curious.
Fixed it!

Sorry, explain how going to an uel header is an upgrade.
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Old 11-19-2008, 01:11 PM   #11
mdungelman
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If you consider removing a cat and getting some rumble as a side effect an upgrade (I certainly do).

I find that I have more power down low. No data on paper, but I'm downshifting less on hills that I've driven up hundreds of times.

And no CEL's here.
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Old 11-21-2008, 06:46 AM   #12
WRXbrother
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Basically, my car pulls ok in higher rpms, but I would definitly like to gain a little more in lower rpms. I already don't have a muffler. I am getting a panel filter this week (old one was really bad anyway). I would like a little more rumble along with more low end.

Has anyone got a CEL form doign a header?
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