Wiseco Max Series 23 Degree Strutted Forged Pistons, Pins, Locks and Rings. Gen 1 SBC 350+30 over bore=355CID Make: Chevy Engine: 350 SBC / Bore 4.030 “/ Stroke 3.48 “/ Rod Length 5.700 “/ Crown Volume -5.7cc Flat Top Asymmetrical valve pockets / Compression Height: 1.550″/ Compression Ratio App 9.7:1w64cc head / Pin Diameter.927”-2.250″with locks / Piston Material Forged 2618 Alloy / Piston Weight 447grams / Lateral Gas ports / Ring Grooves 1.2,1.2, 3.0 mm GFX / Rings package file fit / Top ductile plasma moly with barrel face/ 2nd cast iron phosphate taper face/ oil flex vent standard tension / Armor Glide Coated Skirt / Sold as kit for 8 Cylinder. Applications 600+hp N/A street, strip, mild nitrous and forced induction. Special order item 3-5 business days. Please e-mail with questions and availability.