COMP Cams 1983S-1 Bushed Straight Rocker Arm for GM LS7 Engines

The COMP Cams 1983S-1 is a single straight bushed rocker arm designed for GM LS7 cylinder head applications. This individual rocker arm is part of COMP Cams' Max-Lift BSR (Bushed Shaft Rocker) platform, engineered to deliver superior valvetrain stability and durability over stock needle-bearing rocker arm designs.

Unlike conventional needle-bearing trunnion rockers that are prone to cageless bearing failure under increased loads, the 1983S-1 uses a tri-layer bushing design that reduces rocker arm deflection and eliminates the high Hertz loading that can occur with needle bearing setups. The result is a stiffer, more precise valvetrain that transfers more cam lobe lift directly to the valve — effectively making your existing camshaft perform as if it were a slightly more aggressive grind.

The straight rocker body configuration is specifically matched to LS7 raised rectangle port cylinder head geometry, ensuring correct rocker-to-valve stem geometry for optimal performance. A plasma nitride surface finish minimizes friction and extends service life, even under the demands of aggressive solid roller camshaft profiles.

Key Features:

• Tri-layer bushing design eliminates high Hertz loading and reduces deflection
• Straight rocker body matched to GM LS7 raised rectangle port head geometry
• Plasma nitride finish for reduced friction and increased durability
• Compatible with the Max-Lift BSR shaft rocker system for LS7 applications
• Supports use of higher-lift, more aggressive camshafts
• Sold individually — ideal as a replacement or spare component

Whether replacing a worn component in an existing BSR shaft system or building out a high-performance LS7 valvetrain, the COMP Cams 1983S-1 delivers the precision and durability demanded by serious performance builds.