chances are the FRM sleeves are damaged from sidewall contact.

you can rehone the bores and drop in some .25mm overbore pistons.

if you're looking for a performance build, ductile iron sleeving or cast iron sleeving would be recommended. depending on the vintage of your prelude, you can just resleeve the A1's, or go with a solid deck solution on the A4.

dropping forged pistons into an FRM cylinder wouldnt be recommended unless they have a slipskirt design.