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Old 09-30-2008, 08:49 PM   #1
Scooby Specialist
Member#: 141863
Join Date: Feb 2007
Chapter/Region: NESIC
Location: Worcester, MA
04 Forester XT

Default 04 STI engine -> 02 WRX questions

What I have: 02 WRX with an 04 WRX Tranny
What I have to Install: Complete (everything under the hood) 04 STI engine with ECU, engine bay wiring, control arms and x-member.
What I want to end up with: a fun ass DD.

My Questions:
1. What will I need to mate the 04 STI engine to my 04 WRX tranny?
2. I believe I will need a V7 JDM STI ECU, is this correct?
3. What else do I need?

When I go away to Basic Training in 4 months, my brother and Father are going to install this for me for a cool $500 + a couple of remodeling weekends at my parent's house.

Thx, Dan
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Old 10-01-2008, 02:16 AM   #2
Scooby Specialist
Member#: 182337
Join Date: Jun 2008
Chapter/Region: Tri-State
Location: UTah
1997 Impreza Outback
Sport -- White


huh? what do you mean the trnny engine match up fine you don;t have to do anything especially if you;re running the STI ECU you'd judt have to splice some wires besides that it'll work fine mechanically...

or did i just misunderstand the question
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Old 10-01-2008, 02:17 AM   #3
Scooby Specialist
Member#: 166898
Join Date: Dec 2007
Chapter/Region: W. Canada
Location: Canada
1994 T leg SS


Sounds like your on the right track, many people have answered this on Nasioc, Do some searching and return to this thread

1. Engine Should Be a Direct Bolt-on, If you can Get a stronger tranny than your 02 WRX those trannies are known to be ****

2. You will need the entire harness that goes with that car

3. Searching will answer this.
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Old 10-01-2008, 02:43 AM   #4
hybrid gti 2
Scooby Guru
Member#: 67004
Join Date: Jul 2004
Chapter/Region: SCIC
Location: (818) 300k+ ej205 ppg 5mt
02 vf30 pnp wagon
silver and cf


Most of answers is in the dummie's guide to doing a sti swap
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