THIS IS THE TRAXXAS TRX 3.3 RACING ENGINE WITHOUT STARTER. FEATURES: 1-PIECE IPS CRANKSHAFT, SLIDE-VALVE CARB, AIR FILTER, OIL, GLOW PLUG FOR USE IN ALL TRAXXAS TRX2.5 AND TRX 3.3 VEHICLES W/FLYWHEEL ACCESS REQUIRES: 10-33% TRAXXAS TOP FUEL, BUMP STARTER OR STARTER BOX OF MODELER'S CHOICE