GLM Exhaust Manifold Gasket Kit for Mercruiser

Keep your Mercruiser engine protected with the GLM Exhaust Manifold Gasket Kit (GLM39300), designed as a premium replacement for reliable sealing and long-lasting performance. Compatible with Sierra 18-4398 and equivalent to Merc 27-53354A, this kit ensures a precise fit and optimal engine operation.- Provides a secure seal between exhaust manifold and cylinder head- Protects against extreme exhaust temperatures (over 1000°F) and corrosive cooling water- Durable marine-grade gaskets resist warping, cracking, and corrosion—even in saltwater- Maintains separation of water and exhaust to prevent cylinder intrusion- OEM-equivalent design for reliable performance and longer manifold life- Helps reduce risk of hydrolock and valve damage- Promotes better engine breathing and smoother operationApplications: Mercruiser engines (verify fitment for your model). Install with proper surfacing and light sealant for best results.