Those pistons are considered "higher compression" than stock because they use a pretty tall compression height. Gets the piston up in the bore at TDC to help bring compression up. You'll need to figure out your deck clearance with those and also keep in mind piston to valve clearance......you should be plenty safe but keep it in the back of your mind.
Well, they are only .015" taller than others..... only an added 0.4 points or so with the lack of eyebrows. Deck clearance is around .067" with a stock LA deck. Still 'in-the hole'. Not 'high compression'.
And yes on the P-V clearance... another thing that goes along with using a smaller cam.
