ICON 15 Degree GM LS Series Forged Pistons, Pins, Locks and Rings. SBC 408 CID Stroker Make: GM LS Chevy Engine: 408 SBC/Bore 4.030″ Stroke 4.00″/ Rod Length 6.125″/Crown Volume -4.cc Flat Top (2V)/Compression Height: 1.115″/ Weight 418g/ Compression Ratio 11.1:5w64cc/ Pin Diameter.927″-2.250″/Round wire locks /Piston Material Forged 2618 Alloy/Ring Lands 1.2, 1.2, 3.0mm file fit Plasma moly rings standard oil tension/Anti-Friction Coated Skirt/ Sold As Kit (for 8 Cylinder). Applications 600+hp street, strip, mild nitrous and forced induction. These are a special order item 5-7 business days. Please e-mail with questions and availability.