Holden 253 304 308 12 Point Black Oxide Intake Manifold Bolt Kit All kits come complete with

All kits come complete with 4130 heat-treated

Windsor and Big block applications feature cast construction

and less chance of crank failure

Speedmaster alternator brackets add some shine to your engine accessories

Speedmaster Forged pistons are made from 4032 aluminum alloy for quieter operation and reduced piston to wall clearance

Holden 253 304 308 12 Point Black Oxide Intake Manifold Bolt Kit All kits come complete withSpeedmaster 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.