12 Point 7/16" 1900-2000 Connecting Rod Bolts (16 Pcs) and header clearance

and header clearance

These Speedmaster supercharger manifolds are aluminum constructed and suitable for competition or street use

Speedmaster rocker arm adjusting nuts are high-quality polylocks designed for full roller rocker arms

made from 4340 round bar to exact tolerances

12 Point 7/16" 1900-2000 Connecting Rod Bolts (16 Pcs) and header clearanceSpeedmaster connecting rod bolts are precision CNC machined to exacting specifications and designed for optimum reliability. They are heat treated and threads are rolled to provide up to ten times more fatigue strength. This makes them far superior to standard OEM fasteners in terms of durability, and fully capable of handling the extra stress of high combustion engines.