Check the listing for details. Pistons and MOLY Rings Combo kit compatible with Chevrolet SBC SB 350 5.7L. Condition: New. Listed at 241.82 USD. This listing is for a set of (8) Speed Pro Hyper-eutectic Flat top w/ 4 valve reliefs Pistons & matching Moly Rings compatible replacements for 1968-85 350 Chevy. 350 BASED engine (4.000" bore x 3.480 Stroke). In your choice of Over sizes. Select over size needed before placing in cart. Ring dimensions 5/64, 5/64, 3/16 Accommodates pressed or floating wrist pin installation. LOCK RINGS for floating pins ARE SOLD SEPARATELY and are not included with this set. Available in Std. +.020" +.030" +.040" & +.060" over size. Can Be Press or floating pins. Lock rings for floating pins not included. Coated skirt pistons. Compression Ratio with 64CC heads:STD size 9.22:1+.020 over 9.29:1+.030 over 9.33:1+.040 over 9.37:1+060 over 9.44:1 Please Select size needed from drop down before adding to Cart!