SBC Stainless Steel Valves, intake is 11/32" X 5.040" X 2.080" , exhaust is 11/32" X 5.040" X 1.600". Springs are a dual race spring with Del-West titanium retainers and steel machined locks. Cycled out on freshen, good usable parts. All items are for sale locally and can end at anytime. Payment is due at time of transaction.