Chevy 350 Complete 4 Bolt Splayed Steel Main Caps (5 Caps) Speedmaster valve seals are posi-stop

Speedmaster valve seals are posi-stop seals made from high-temperature Viton¨ material for a long-lasting seal

Speedmaster oil pump pickups are engineered for maximum flow and long-term durability

maintenance-free operation

They include a drain plug for clean and easy fluid changes

horse power increase of 10-15

Chevy 350 Complete 4 Bolt Splayed Steel Main Caps (5 Caps) Speedmaster valve seals are posi-stopSpeedmaster main caps are precision machined from superior quality steel. They come available as stock replacements (straight bolt) or with splayed outer bolt holes. These extreme main cap sets consist of all 5 caps including the rear and front cap. Speedmaster main caps improve reliability in highly stressed engines by reducing distortion of the main bearing bores, and increasing the cap's resistance to closing up under high loads.