Holden 253 304 308 12 Point Black Oxide Intake Manifold Bolt Kit High performance fuel injectors

High performance fuel injectors

but have profiled counterweights for less weight

Windsor and Big block applications feature cast construction

They are heat-treated prior to thread rolling and machining and are rated at a whopping 190

protective

Holden 253 304 308 12 Point Black Oxide Intake Manifold Bolt Kit High performance fuel injectorsSpeedmaster 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.