XTM Racing engines are designed for high power output and easy handling. The XTM 457 Pro Truck 6 Port Engine with Rear Exhaust features a dual ball bearing-supported SG-style crankshaft, true ABC piston and sleeve, two-needle slide carburetor, heat-dissipating cylinder head, pull-start assembly and superb attention to detail and quality. All XTM racing engines are manufactured using CNC manufacturing equipment to ensure every engine is produced to the exacting quality that you have come to expect from an engine of this caliber.