Holden 253 304 308 12 Point Black Oxide Intake Manifold Bolt Kit Precision CNC-machined threads to ensure

Precision CNC-machined threads to ensure optimum seat pressure

Speedmaster aluminum valve covers feature a classic raised

open screen design

Made from premium materials and built to exacting tolerances

Try a set of these Speedmaster aluminum valve covers

Holden 253 304 308 12 Point Black Oxide Intake Manifold Bolt Kit Precision CNC-machined threads to ensureSpeedmaster 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.