Subaru Impreza WRX STI Forums: IWSTI.com - View Single Post - Contemplating a new project - Building an Engine
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Old 10-07-19, 12:12 PM  
yamahaSHO
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Default Re: Contemplating a new project - Building an Engine

Quote:
Originally Posted by Leemanfor View Post
Correct

the EJ255 and EJ257 are the same case halves. Just lower compression pistons in the STi.

the WRX use Single AVCS heads, B25 IIRC. The STi uses dual AVCS heads, W25 heads.
WRX has smaller rods too... Although, they are forged as well.
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