Michigan Motorsports LS Rocker Arm Stands | Like GM #12552203 | Fits Cathedral Port LS Engines 4.8L 5.3L 5.7L 6.0L LS1 LS2 LS6 LQ4 LQ9 LM7 | OEM Rocker Pedestals

The GM rocker arm stands 12552203 are designed for cathedral port LS cylinder heads to properly support and locate the rocker arms for correct valvetrain geometry and operation. These OEM-style pedestals ensure accurate rocker alignment, consistent valve motion, and reliable durability under factory and mild performance conditions. Worn or damaged rocker stands can cause improper valve actuation, noise, and accelerated valvetrain wear. Ideal for engine rebuilds, rocker arm replacement, or restoration projects, these direct replacement stands restore factory-correct fitment and long-term reliability for LS engines used in cars, trucks, and performance applications.

• OEM-Style Rocker Pedestals: Manufactured to GM factory specifications for proper rocker arm support and alignment.
• Cathedral Port Compatibility: Designed specifically for cathedral port LS cylinder heads used on common Gen III LS engines.
• Maintains Correct Valvetrain Geometry: Ensures consistent rocker positioning for smooth valve operation and reduced wear.
• Direct Replacement Installation: Installs directly in place of factory rocker stands with no modifications required.
• Ideal for Engine Service: Commonly used during rocker replacement, head service, and full LS engine rebuilds.