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Old 09-09-2015, 04:27 AM   #1
Bigred89
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Default 04 body 06 engine

i have two cars, an 04 wrx with a spun rod bearing, and an 06 wrx with a rotted shell but good motor. im going to be swapping the ej255 into the 04, but what do you guys recomend for parts to keep from one or the other? should i swap heads over and build a hybrid?
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Old 09-09-2015, 02:52 PM   #2
Circuit Motorsports
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Location: www.CircuitMotorsports.net
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2005 STi Urban Camo
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take the 2.5 motor...all of it. lol. You can do a hybrid if you'd like but it's important to consider your final goal since it can most likely be accomplished with the 2.5.

most people I've read and met wanting to do a hybrid is because they only have a 2.0ltr to start off and try to save a little money by reusing the heads they already have.

in your case you have the full engine....so build that up and sell whatever is good on the 2.0.

- Abel
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Old 09-11-2015, 12:34 AM   #3
Bigred89
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will i have to do a tune on the car or will it run fine as is?
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Old 09-12-2015, 09:12 PM   #4
slowgenius
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This is a similar swap if you care to look. Almost exactly what you need to know. The clutch, flywheel and tranny are different from the 04 to 06. The ej255 will go right on the 04 tranny but keep the ej205 flywheel and clutch. You can put an sti clutch and flywheel on the ej255 and clearance the bell housing of the 5 speed if you so desire also.

http://forums.nasioc.com/forums/show....php?t=2630153

Also, you can swap the front fenders, bumper, headlights and hood if you have all the pieces. And if you are willing to part with some pieces of the 06 let me know.

Last edited by slowgenius; 09-12-2015 at 09:19 PM.
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Old 10-06-2015, 12:32 AM   #5
Bigred89
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thats not really the same swap at all... hes dropping an STI block with harness and ecu, there are a couple of other really good writeups of those swaps, but im putting an 06 WRX engine into the 04 body, using the 04 harness, ecu, throttle body, intake and exhaust manifolds, deleting the secondary air system, and using the 04 knock sensors and relocated cam position sensor
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