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Old 02-25-2013, 12:34 AM   #38
Scooby Specialist
Member#: 127745
Join Date: Oct 2006
Chapter/Region: NWIC
Location: CA
06 WRX 30r 6 speed
99L EJ255 6 Speed


The total tolerance for OEM pistons is .0004" - .0012" MAX. That is .0008" FYI. The difference between the smallest A and largest B pistons is .0008" Not an official mathematician, but I am pretty sure that would leave a .0000" PTW if a large B piston was used in a small A hole. The FSM I have says A is big and B is small, but I am pretty sure it is all ****ed off.

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aboothman is offline   Reply With Quote