Product Details Key Features 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. Side exhaust E-3071 Power Box muffler with squared-off shape enables it to fit into a variety of cowls 40K carburetor with rear angled needle valve for added safety Ball bearing-supported crankshaft In The Box One O.S. Max .46AXII ABL BB model airplane engine w/muffler A3 glow plug Extension cable for remote needle 3mm x 35mm cap head muffler screws Decal sheet Illustrated instruction manual Two 3mm x 35mm cap head muffler screws Requires: 5-20% glow fuel Recommended Props: 10.5x6, 11x6, 11x7, 11x8, 12x6 & 12x7 Correction to three view drawing; Crankshaft thread is 1/4 UNF (28 TPI)