O.S. Max 21 VG-P Pilot Shaft Sport Engine has a 1/4-28 pilot (SG) crankshaft for Centax type clutch. Advanced Bi-Metallic Liner. This process uses a double layer of plating material rather than one thick layer. This helps the metal to bond to the cylinder and is more durable. Also, the plating process is more consistent, resulting in a more precise fit between piston and sleeve for better compression, longer life. Two-needle 21F Slide Valve Carburetor. One-piece 8-fin Tornado cylinder head uses standard glow plug. Rear exhaust. Two year limited warranty. This product includes O.S. Max .21 VG-P pilot shaft sport engine with slide valve carburetor, exhaust seal ring, #8 glow plug and instruction manual.

Fuel: Nitro car blend with 10-30% nitro content and at least 16% lubricant. Glow starter and track equipment.