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Double’d Up—Charles Hull and Joel Greathouse Capture X275 and Ultra Street Championships


It was a busy season for the KBX Performance crew and two red rockets lead the group to a double championship in 2019. Five-time champion Joel Greathouse drove his turbocharged 1993 Mustang LX to the Ultra Street championship while Charles Hull locked up his first national title in X275 with a nearly matching Mustang.

Greathouse relies on a Bennett Racing 400U powerplant that is built specifically for Ultra Street, complete with a Dart engine block, Trick Flow High Port cylinder heads with a special Bennett Racing CNC port program, and a Forced Inductions 76mm turbocharger. The drivetrain features a Powerglide built by RPM Transmissions while a Pro Torque converter helps transfer the power. The combination produced a best of 4.608 at 155 mph as Greathouse collected four class wins and numerous top qualifiers. Justin McChesney is the crew chief on Greathouse’s Mustang and the team uses their reliable Big Stuff 3 for engine and power management.

Hull’s machine is one step up in all of the departments for the quicker and faster X275 category. The engine relies on a Shelby block, topped with a pair of Bennett Racing billet cylinder heads and custom intake manifold. Hull rocketed to bottom 4.30 performances at close to 170 mph; he boasts a final-round appearance in all nine X275 championship races in 2019, winning four of those finals. An M&M Racing Transmission and Pro Torque converter backs the 2,000hp combination while KBX’s McChesney and John Kolivas worked with a FuelTech FT600 engine management to control the power.

Greathouse and Hull are teaming up for an assault on the NMRA in 2020 with Greathouse driving the X275 car in VP Racing Fuels Street Outlaws. The Ultra Street Mustang will also see action in NMCA competition and select Ultra Street events. Hull will slip behind the wheel to defend his title in X275 for 2020.

Mike Galimi
Mike Galimi
Mike Galimi is the Director of Content & Marketing at ProMedia Publishing and Events with nearly 20 years of experience in motorsport writing and photography.