O.S. replacement cylinder head for the MAX .12CV-R engine. This is also called a Heatsink Head.

O.S. cylinder/headsink head assembly for the Max .21 VZ-R engine. It features a two-piece design for easy Heatsink replacment.

O.S. Heatsink Head assembly (cylinder head) for the .21 VZ-R Ver.II engine.

O.S. outer cylinder head for the Max .21 VZ-R engine.

This is the Inner Head (Head Button) for the OS .21 VZ-M Marine Engine.

O.S. heatsink head for the Max 30VG Monster Truck Engines.

O.S replacement heatsink cylinder head for the 50 SX-H Ring Hyper. This will also fit on the standard 50 SX-H Ring.

O.S replacement cylinder head for the O.S. .81 VR-M marine engine. Itis for the newer 81 VR-M series of engines. One piece is cylinder head A, the other is B. Cylinder head A has the pressure fittings on each each for water cooling. A head gasket (or shim) is included. Head screws are not included.

O.S. cylinder head for the Max .91SX-H C-Spec Heli Engine.

O.S Heatsink Head for the 91SX-H Ring C Spec PS.

O.S. replacement Heat Sink Head for the 91 SZ-H Ring.

O.S. cylinder head with valves for the Max FS-70 Surpass II four stroke engine. The cylinder head bolts to the top of the crankcase and houses the intake and exhaust valve assembly and the glow plug.

O.S. cylinder head only for the following engine(s): FS-70 Surpass. A head gasket is included. The valve assembly is not included.

O.S. cylinder head (without valve assemblies) for the Max FS-70 Surpass II Four Stroke Engine. The cylinder head bolts to the top of the crankcase and houses the intake and exhaust valve assembly and the glow plug.

O.S. cylinder head assembly only for the OS Max Car Engine FS-26S-C.

O.S. cylinder head only for the following engine(s): FS-26 Surpass A head gasket is included. The valve assembly is not included.

O.S cylinder head with valves for the Max FS-52S (Surpass) four stroke engine. The cylinder head bolts to the top of the crankcase and houses the intake and exhaust valve assembly and the glow plug.

O.S cylinder head (without valve assemblies) for the O.S. Max FS-52 Surpass Airplane Engine and the FS-52 Helicopter Engine. The cylinder head bolts to the top of the crankcase and houses the intake and exhaust valve assembly and the glow plug.

O.S cylinder head with valves for the Max FS70 Ultimate.