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Old 03-02-2013, 07:35 PM   #1424
Patrick Olsen
NASIOC Supporter
Member#: 120
Join Date: Jul 1999
Chapter/Region: AKIC
Location: Where the Navy sends me...
1997 Legacy 2.5GT
1996 Impreza coupe


I dunno... both the old pistons and the new pistons I have don't have any valve reliefs at all. They have a very slight dish in the center of the piston crown - may 25mm in diameter - but I wouldn't think that was for valve clearance.
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