I have a set of 10:1 pistons that I removed from a BP6D. The motor was in good condition with a reported 79k on it and 180 psi compression across all four cylinders. I performed a leak down test with results all under 10% except one cylinder which sat at 18% but the leak seamed to be coming from an exhaust valve. Piston bores look good and I had Blackstone do an oil analysis that came back without any problems. I cleaned the pistons thoroughly with carb cleaner to better inspect them, only noticing some scuff marks on the skirts, none of which I can catch a fingernail on. Great for an N/A or E85 build.

I'm looking to trade for a set of OEM 9:1 pistons in similar condition.

 

I ended up selling the 10:1 pistons and buying some new 9:1 OEM pistons.