This is the Ofna/Picco .26 (4.27cc) Max JL Red Dot Engine with Pull-Starter for the Traxxas T-Maxx or Revo. FEATURES: Specifically engineered as a direct replacement for the stock Traxxas T-Maxx or Revo engine Uses existing Traxxas clutch assembly, manifold and pipe Composite body slide valve carburetor Black in color with 10-fin black cylinder head INCLUDES: One Ofna/Picco .26 Max JL Red Dot Engine for the Traxxas T-Maxx, carburetor and carb mounting hardware, pull starter, instruction manual and silicone gasket REQUIRES: Glow plug: (OSMG2693) Fuel: 25% nitro content and at least 10% lubricant content content Engine Mount: OFNG1530 (T-Maxx) OFNG1531 (Revo) SPECS: Displacement: .26 cu in (4.27cc) Horsepower: 2.7 Stroke: 16mm Bore: 18.2mm RPM: 34000 Weight: 11.2oz (320g) Crankshaft: SG (pilot) Exhaust: Rear Distance between mounting hole centers same side: .87" (22mm) Distance between mounting hole centers opposite side: 1.4" (37mm) Height from bottom of crankcase to top of cylinder head: 4.0" (103mm) Length from starter plate to front bearing: 2.3" (57.6mm) Length from starter plate to end of crankshaft: 3.3" (84mm) Length from center of crankcase to end of crankshaft: 2.6" (66mm) Width of mounting tabs: 1.7" (44mm) jxs 7/16/08 ir/jxs