ADA Racing Billet Cylinder Head for the 1991-1995 550SX aluminum reed cylinder engine. Head design is all o-rings and does not use a head gasket. The head is designed to be installed with the water outlets on the intake side and has 3 water outlets available. Head shell includes o-rings, brass water fittings and plugs. This head uses the stock studs and nuts. Does NOT include domes, you will need to order domes below under Related Products.
NOTE: This does NOT fit the 550 cast iron piston port cylinders.
