Description Technical Specs Traxxas short crankshaft is constructed of ABC (Aluminum Brass Chrome). Oversized Machined Aluminum Blue/Silver Anodized Cylinder Head. Channelled Beam Connecting Rod for Improved Oil Flow. Precision Ball Bearings Large-Bore, High-Flow Carburetor. Double O-Ring Seals on High and Low Needles. Industry-Standard Mounts and Crankshaft Lengths to Fit Most Applications. INCLUDES: One Assembled Engine With Pull Starter One Air Cleaner (black rubber with black foam element) One Full Instruction Book and Parts Exploded View One "Traxxas" Decal Sheet Installed Glow Plug (standard long--no idle bar)***Mount the same as an OS .12 and .15 CV*** Required Parts REQUIRES: A 1/10 scale kit to put it into and 5%-20% Glow Fuel.