MANLEY 432891-1 Rocker Arm 1.6 X 3/8", Aluminum for SBF 289-351W

Description MANLEY 432891-1 Rocker Arm 1.6 X 3/8", Aluminum for SBF 289-351W

The aluminum rocker arms are engineered for high-performance engines operating under extreme conditions on the street, drag strip, or track. Manufactured from aerospace-grade 2024 billet aluminum and precisely machined using advanced CNC technology, these rocker arms offer a significant upgrade over standard stamped steel components. Each rocker arm is designed to deliver superior strength, precise geometry, and optimal reliability under high loads and elevated spring pressures.

• Constructed from aerospace-grade 2024 billet aluminum for superior strength-to-weight ratio
• CNC machined for exact tolerances and consistent performance
• Heat-treated and polished steel nose rollers, axles, and trunnions for 60-62 Rockwell hardness
• Shot-peened surface to enhance durability and reduce stress concentrations
• Anodized finish for added resistance to corrosion and thermal fatigue
• Rated for up to 750 lbs of open spring pressure, ideal for aggressive cam profiles and high-revving setups