Intake Exhaust Gasket for Mercruiser replaces 27-815528 17304 This gasket is designed to fit intake and exhaust manifolds on Mercruiser marine engines.It serves as a direct replacement for part numbers 27-815528 and 17304.The gasket helps maintain proper seal integrity between the cylinder head and manifold, preventing leaks of exhaust gases and coolant.Constructed from materials suitable for marine engine environments, it supports under typical engine temperatures and pressures.Installation requires standard hand tools and adherence to recommended torque specifications for performance.