Speedmaster street series rotating assemblies offer the perfect balance of strength, performance, reliability, and affordability. They include a Speedmaster cast steel crankshaft, Speedmaster I-beam 5140 connecting rods with ARP bolts, Speedmaster hypereutectic pistons, Speedmaster rings and 'King Bearings' Main & Connecting Rod Bearings. Speedmaster street series rotating assemblies are the perfect choice for engines up to 500 hp and IDLE-5500 RPM.
- Provide industry-leading fit, finish, and durability.
- Designed for performance enthusiasts wanting to get the most out of their engines