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

They are manufactured from cast aluminum and are offered with breather holes or without any holes

Speedmaster braided hoses feature a partial stainless steel reinforcement within the inner braid

strength and horsepower capabilities are significantly outstanding compared to cast forged crankshafts

Provides very positive shifts for high performance street use or for competitive events

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.