THIS IS THE TRAXXAS TRX 3.3 RACING MULTI SHAFT ENGINE WITHOUT STARTER. FEATURES: 2 THREADED CRANKSHAFT INSERTS, 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