OEM-style molded valley cover gasket engineered for GM LS1 and LS6 engines using the 10-bolt valley cover design. Built with molded rubber bonded to a rigid aluminum carrier, this gasket provides excellent sealing stability, proper crush control, and long-term durability. A direct replacement for GM part number 12558178 and ideal for OE repairs or performance engine builds.
• Fits GM LS1 and LS6 10-bolt valley covers
• Molded rubber construction with aluminum carrier
• High-quality OEM-style sealing surface
• Direct replacement for GM #12558178
Print these and leave them around the house... Christmas is coming up!