To my knowledge, there are 8:5.1 pistons or 8:0.1 pistons, they did not make a 8:75.1 or a 9:0.1 piston.
With production tolerances being not so great, if you had 8:5.1 pistons, you would be lucky to have an 8:0.1 compression ratio, pistons being down the bore, chambers sometimes bigger etc.
Plus todays head gaskets are not thin as they used to be.
.038" & thicker as compared to the old style ones of what, .015-.020"?
This is all I found about the description, other than .030" over.
"Product Details
Sub Type: Engine Piston
Notes: Description--Engine Piston "
MBHD
