Holden 253 304 308 12 Point Black Oxide Intake Manifold Bolt Kit The Speedmaster Billet Command Centre

The Speedmaster Billet Command Centre sump kit uses the stock low-pressure

Match your camshaft with Speedmaster iron distributor gears

Windsor and Big block applications feature cast construction

They are made of aluminum and feature a natural finish

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

Holden 253 304 308 12 Point Black Oxide Intake Manifold Bolt Kit The Speedmaster Billet Command CentreSpeedmaster black oxide coated chromoly intake manifold bolts are rated at 170,000 psi. They're precision machined for optimum thread engagement and have a wide area flange for better load distribution. They also feature precision rolled threads, which prevent galling, while promoting more consistent torque loading.