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Old 10-21-2011, 03:23 PM   #1
Scooby Specialist
Member#: 182384
Join Date: Jun 2008
Location: Nashville,TN
2014 Impreza WRX STI

Default Difference between EJ257BG1LB & EJ257BW7CH

I'm trying to replace my 05 sti engine (EJ257BW7CH)
with an engine from an 08 sti (EJ257BG1LB )
(I have checked the part# of both engines,only the pistons had the exact same part# ...but i know that part#s don't give the full story. Are both engines interchangeable? If not is there a high degree of modification required to install the 08 engine into the 05?
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Old 10-21-2011, 07:45 PM   #2
Scooby Specialist
Member#: 40424
Join Date: Jul 2003
Chapter/Region: MAIC
Location: NoVA
05 STi


If you're doing JUST the short block then its a direct swap and no other modifications are needed. The heads are different however so doing a long block is going to cost more money and effort.
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