This valley cover gasket is engineered for GM Gen V LT engines and replaces the stock valley cover gasket to ensure a reliable seal between the engine block and valley cover. It prevents oil leaks from the lifter valley area and helps maintain internal engine cleanliness and proper oil control. The gasket is ideal for rebuilds, DOD/AFM delete conversions, or whenever the valley cover is removed and resealed.

Brian Tooley Racing BTR23104 Features:

• Fitment: GM Gen V LT-series engines (LT1, LT4, L83, L86, 5.3L & 6.2L applications)
• Seals engine block valley to valley cover to prevent oil leakage
• Direct-fit replacement for OEM valley cover gasket (like GM 12623104)
• Compact gasket design suited for stock or modified LT valley covers
• Sold individually — install as needed per engine rebuild or maintenance

Brian Tooley Racing BTR23104 Notes:

• One gasket required per valley cover installation
• Recommended to replace gasket whenever valley cover is removed (e.g. during AFM/DOD delete, lifter service, or engine teardown)
• Verify engine variant (LT1, LT4, L83, L86 etc.) for compatibility before installation