Jan 10, 2009 · The blocks themselves are identical. The EJ257 and EJ255 share the same block castings, crank, and rods. The difference is the piston dish and heads. The combination of the small …

Apr 27, 2017 · I know, I know. Please don't flame me. :beatentod I have a 2012 WRX Premium (EJ255). It has about 87,000 miles on it (140,000km). I change the oil religiously at 3,000 miles. I typically run …

Dec 28, 2008 · There seems to be some misconceptions about the way these things work. Most people new to turbocharging are just looking for the additional sound. So I figure I'll do my best to clear …

Aug 28, 2011 · Need Help! 04 RS EJ255 swap AVCS or no AVCS? Jump to Latest 16K views 12 replies 6 participants last post by mosc Aug 29, 2011 C

Apr 22, 2010 · Edit: Shoaf is now running a highly modified EJ255 short block with his highly modifed '02 heads (This is known as a hybrid block/build). Because the EJ255 bottom end really helps spool the …

Jul 10, 2016 · I have a few questions.. 1. With a COBB V2 accessport, how much difference in hp will I get between a catted or catless downpipe 2. If down the road I decide to add an intake to this combo, …

Apr 16, 2010 · I think the EJ255 in your car Mike benefits from a bigger turbo based on the TD05 housing, you might want to price out a 16G or 18G. Note though that you'll need fuel and cooling …

Oct 31, 2014 · EJ257 case halves (empty): The case is the same on all USDM STI's from 2004 - 2010, and is also the same block found in the EJ255 engine found in the 06+ WRX and 05+ Legacy GT. …

Aug 21, 2004 · The ej255 heads actually flow better but have a shallower dishing. The ej257 doesn't flow quite as well, but has deeper dishing and with the ej257 pistons dome... a lower compression ratio.

May 4, 2010 · The EJ205 actually is a better balanced engine than the EJ255. I would say they are very similar but if I had to pick based solely on longevity, I'd pick the EJ205.