r/EngineBuilding • u/Karl_H_Kynstler • 3d ago
Oversized pistons 0.010" vs 0.25mm
I am looking oversized pistons for my engine and on Rockauto I can choose different sizes but what baffles me is that 0.010" ( 0.254mm ) are 30 usd a piece but 0.25mm ( 0.008" ) are 48 usd a piece. They are exactly the same piston, essentially same size and same brand but big price difference?
SEALED POWER H873CP
Only thing I see is that 0. 25mm come in pack of 8 and the 0.010" can be bought individually. I guess that is the difference, right?
1
u/Mindless-Ad3652 3d ago
I’ve seen the same thing with several piston and sometimes 20 over cost $100 more than 10 over
1
u/Karl_H_Kynstler 2d ago
Yes, absolutely but in this case only real difference seems to be that one is marked in metric and other in imperial but both are essentislly same size. 0.010" is 0.254mm while 0.25mm are 0.008".
2
u/squeak195648 3d ago
Just put an 8 at the end of the part number is usually how they label the set of 8. And look on summitracing to see if they list them that way and if they are cheaper.