***RESOLVED***

HELP!!!

As per title

Can the EJ257 Pistons be used in a EJ255 Block without any changes to heads or gaskets or anything else?
From What I've read there should be no issue with this... Despite differences in Cylinder Heads.

The Blocks have been Decked (not sure how much was taken off at this stage) do I need to run a thicker gasket to compensate? How do i go about measuring the deck height?

Everything moves freely without the heads on.

Any recommendations?


MY EJ255 Build:

CP Pistons 100mm, 8.2:1
Scat Rods H Beam 79mm stroke 130.5mm length
ARP Head Stud Kit std (260-4701) 11mm
Front and rear crank seals
OEM Complete Master Gasket and seal Kit (WRX/STI 06-07)
Main Bearings
Big End Bearings (Rear Thrust Type)
Oil Pickup Tube
Timing Belt
Main Timing Pulley (Crank)

Machine Shop:
Clean Block (Acid Bath)
Hone and Bore 20 Thou Overbore / Measure Cylinder Bores
Deck the Block (Shave)
Polish Crank / Replace Bearings to suit