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but I am measuring to the lower part of the piston, not the dome, KryslerKid

Measure both as you'll need both dimentions, the dome for piston to head(quench) and the flat area around the circumference and the dome for CR. Using a dial indicator in a bridge. when you have all your dimentions plug them in here(to get your ACTUAL CR). http://kb-silvolite.com/calc.php? and when you find the part # for the pistons you'll be able to get a listed spec for the piston dome in cc's.



Double R, TRW dome pistons are not step head pistons like KB's , it's a regular domed piston. the dome is in the deepest part of the combustion chamber, the piston he has is probably the 2295 ???