G'day, I ordered some NPR rings for my B20A6 KY Aussie lude. They came from the States but I believe there is no difference to A5 engine. After fitting the rings there is next to no ring to groove clearance. The piston crowns are cast with PK2 on them and a capital B stamped in the centre. Could they be aftermarket pistons?
Last edited by Rustybit651; 01-30-2010 at 01:41 PM.
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