Yella Terra YT 6653 Pro Street Shaft-Mount Rocker Arm Set for GM LS-Series, 1.70 Ratio

Upgrade your GM LS-series valvetrain with the Yella Terra YT 6653 Twin Shaft Mount Rocker Arm Set. Designed for LS3, L98, and LSA applications, this Pro Street rocker arm kit combines a rigid shaft-mount design with a roller tip to support accurate valve motion and dependable performance in demanding street and performance builds. The aluminum construction helps provide a strong, lightweight solution for high-performance cylinder heads.
The 1.70 ratio is engineered to increase valve lift when used with compatible camshaft and cylinder head combinations, helping optimize airflow and engine response. The shaft-mounted configuration promotes stable rocker alignment and reduces lateral movement compared with conventional stud-mounted rocker systems. This can support consistent valvetrain operation across the engine’s operating range while maintaining a clean, competition-inspired appearance.
Each Yella Terra YT 6653 kit is designed specifically for compatible GM LS3, L98, and LSA engines. Verify cylinder head compatibility, valve train geometry, pushrod length, and required clearance before installation. Proper setup and adjustment are essential for achieving reliable performance and protecting the rocker arms, valves, and related components. The kit is not air restricted and is not designated for truck freight-only shipping.

Features:

• Brand: Yella Terra

• Part Number: YT 6653

• Application: GM LS3, L98, and LSA engines

• Design: Twin shaft-mount rocker arm set

• Rocker Ratio: 1.70

• Tip Style: Roller tip

• Material: Aluminum

• Intended Use: Pro Street and high-performance applications

• Configuration: Complete rocker arm kit

• Shipping Classification: Not air restricted and not truck freight-only