TOP STREET PERFORMANCE 72970 Pro Series 1.70 Ratio Aluminum Roller Rocker Arms for GM LS-Series

Upgrade your GM LS-Series valvetrain with TOP STREET PERFORMANCE Pro Series Roller Rocker Arms, Part Number 72970. Designed for dependable performance and consistent valve-train operation, this set features a full-roller design that helps reduce friction at the valve tip and supports smooth, efficient motion through the rocker arm assembly. The 1.70 ratio can help optimize valve lift when matched with the appropriate camshaft and cylinder head combination.
Constructed from lightweight aluminum, these rocker arms help reduce valvetrain mass while providing the strength required for performance applications. The black anodized finish adds corrosion resistance and a clean, professional appearance under the valve covers. A pedestal-mount configuration provides a direct-fit style installation for compatible GM LS-Series cylinder heads and valvetrain components.
This complete set includes 16 rocker arms, making it suitable for servicing an entire LS-Series engine. Verify compatibility with your specific engine, cylinder heads, pushrods, camshaft, and valve-train setup before installation. Proper adjustment and installation are essential for achieving reliable operation and maintaining the intended rocker arm ratio. TOP STREET PERFORMANCE Part Number 72970 is a practical choice for enthusiasts and builders seeking a durable aluminum roller rocker arm upgrade for a GM LS-Series application.

Features:

• Brand: TOP STREET PERFORMANCE

• Part Number: 72970

• Application: GM LS-Series engines

• Rocker Arm Type: Full-roller design

• Mounting Style: Pedestal mount

• Rocker Ratio: 1.70

• Material: Aluminum

• Finish: Black anodized

• Quantity: Set of 16