Michigan Motorsports Billet LS Cathedral Port Rocker Arm Stands (Pair) | Fits LS1 LS2 LS6 LQ4 L33 LM7 LH6 LC9 4.8L 5.3L 5.7L 6.0L | Heavy Duty Valvetrain Support

These Michigan Motorsports billet LS cathedral port rocker arm stands are engineered to replace factory cast stands with a stronger, more rigid solution for GM LS cathedral port cylinder heads. Precision-machined from billet material, they reduce flex and maintain consistent valvetrain geometry under higher spring pressures and elevated RPM. Designed as a direct replacement for GM part number 12552203, this pair is ideal for performance camshaft upgrades, engine rebuilds, and durability-focused builds where factory stands can deflect. Built for precise fitment and long-term reliability, these billet stands provide improved valvetrain stability for street, towing, and performance LS applications.

• Billet Aluminum Construction: Precision-machined billet design offers increased rigidity and strength compared to factory cast rocker stands for improved valvetrain stability.
• Cathedral Port Compatibility: Designed specifically for LS cathedral port cylinder heads used on a wide range of Gen III LS engines.
• Direct Replacement Fit: Replaces GM part number 12552203 and installs in the factory location with no modifications required.
• Improved Valvetrain Geometry: Helps reduce rocker stand flex under higher spring pressures to maintain consistent valve motion and reliability.
• Pair Configuration: Includes two rocker arm stands to service one cylinder head, ideal for upgrades, repairs, or engine rebuilds.