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Old 12-10-2012, 11:46 AM   #1
ScoobyDrift
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Member#: 315446
Join Date: Apr 2012
Location: Trinidad
Vehicle:
2004 Impreza 2.5L

Default Intake Manifold

Advice: Can a WRX 2.0 Intake Manifold fix on a 2.5 SOHC without any mods done ?
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Old 12-10-2012, 07:27 PM   #2
Counterfit
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Probably not, and why would you want to?
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Old 12-11-2012, 08:16 AM   #3
Storm
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It will fit on an 04 such as your profile indicates. It will not offer any improvement over what you have, and will actually HURT performance unless you gut the TGV's.

There are better choices.
Jay
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Old 12-11-2012, 09:35 AM   #4
ScoobyDrift
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Thanks Storm what options do u suggest?
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Old 12-11-2012, 12:33 PM   #5
Storm
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05+ SOHC EJ25 manifold. Best manifold Subaru makes by far. It will require some work to make the drive by cable throttle body work, but it is well worth the effort.

Jay
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Old 12-12-2012, 01:31 PM   #6
ScoobyDrift
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Thanks bro.
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Old 12-12-2012, 09:21 PM   #7
Storm
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No problem. It has tested to flow just under the Cosworth manifold, which many consider to be the ultimate manifold for a Subaru motor. I changed from a '00 EJ25 manifold to an '06 EJ25 manifold and picked up 32hp (on a heavily modified NA motor).

Jay
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Old 12-13-2012, 08:24 AM   #8
ScoobyDrift
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Nice, what kind of Mods do you have
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Old 12-13-2012, 09:14 AM   #9
Storm
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12:1 compression pistons, 100mm bore, port/polished heads with Delta 3000 grind cams, EJ257 crank/rods/oil pump, 9.5 lb flywheel, WRX injectors, 70mm ford throttlebody, Techworks longtube header and standalone engine management.

Jay
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Old 12-17-2012, 06:52 AM   #10
ScoobyDrift
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I got the EMS, TWE Stage II Cams 12lb Flywheel and Borla Headers, will work on the Pistons, Crank/rods and other stuff.

Thanks
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Old 12-17-2012, 07:51 AM   #11
Storm
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96L Most Over-
Developed Beater

Default

Sell the Borla's and put something useful under there...... I haven't tried the Moore Performance header yet, but I hope to very soon. The design looks solid. The Borla is just a noise maker (beautiful blatty boxer rumble that it is) and they crack if you look at them wrong.....

Jay
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Old 12-17-2012, 09:40 AM   #12
KSTech
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Quote:
Originally Posted by Storm View Post
05+ SOHC EJ25 manifold. Best manifold Subaru makes by far. It will require some work to make the drive by cable throttle body work, but it is well worth the effort.

Jay
This is good advice, as that is a well-designed manifold.

The WRX manifold has a plenum that is way too small, and even with ported TGV's I would think performance would suffer. That manifold was designed with TMIC mainly in mind.
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