Sierra Cylinder Head Assembly 18-4485
Sierra Cylinder Head Assembly 18-4485 Replaces MerCruiser 938-883490R1, MerCruiser 938-883490, Mercruiser 938-883490R50, Mercruiser 938-884741R, MerCruiser 938-884741R50
Fits 5.7L V-8 GM (1987-95) with press in rocker arm studs with 12 intake manifold mounting bolts (4 Inside Intake Manifold Bolts at 23-degrees) Center Mount Valve Covers.