Set of (8) stock type power forged pistons +.030 over size with coated skirts and Moly ring set compatible replacements for Chevrolet 327 - 4.030" bore diameter (at +.030" over) Domed head .125" high w/2-valve reliefs. Special Hi-Perf. (L79/350HP). 5/64" 5/64" 3/16" ring grooves .927" pin diam. - pins included. For stock length 5.7" rods. PRESS fit pins only. Stock 3.250" stroke