Melling 46635-16 Performance Valve Springs Set for 1957-2000 Chevrolet Small BlockStreet to circle track, OEM to drag race performance, Melling valve spring kits cover the market and your requirements. Standard, mid range, heavy duty and race ready applications are available from Melling in a variety of wire sizes, materials, and spring pressures. Melling spring designs include standard and dual springs with and without dampers as well as new beehive applications. Performance valve locks, seals, and retainers included are designed