Pontiac 455 OEM 2 Bolt to 4 Bolt Straight Billet Steel Main Caps They include a drain plug

They include a drain plug for clean and easy fluid changes

and flame ball-milled finishes

and are available in chrome or cast aluminum

They feature a sleek chrome finish with an aluminum housing and have a 100 amp capacity

Pontiac 455 OEM 2 Bolt to 4 Bolt Straight Billet Steel Main Caps They include a drain plugSpeedmaster billet main caps are precision CNC machined from superior quality 1025 billet steel. These extreme main cap sets consist of the center three caps. Speedmaster billet 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.