Traxxas pro .15 w/pull start with long shaft is a long crankshaft Version of the Traxxas Pro TRX-15 Engine.It is for modelers who want higher performance than a .12 size enginein their 1/10 scale kits such as Nitro Hawk, Buggy and Street.This Version Comes With a Pull Starter.FEATURES: ABC (Aluminum Brass Chrome) Construction.Oversized Machined Aluminum Blue/Silver Anodized Cylinder Head.Channelled Beam Connecting Rod for Improved Oil Flow.Precision Ball BearingsLarge-Bore, High-Flow Carburetor.Double O-Ring Seals on High and Low Needles.Industry-Standard Mounts and Crankshaft Lengths to Fit MostApplications.