Since its introduction as an exhibition class in 2022, NHRA’s Factory X category presented by Holley EFI has seen growth in the number of participants and in the interest from fans. For 2024, Holley EFI Factory X is finally having its first full season within the NHRA schedule. According to the NHRA, the class was formed to bridge the gap between Factory Stock Showdown and Pro Stock. The Factory X class blends the excitement of the big three auto manufacturers going head to head in door-slammer battle with supercharged engines and factory-appearing cars, plus the added difficulty of a class-mandated manual transmission makes for thrilling side-by-side racing. Chris Holbrook is campaigning his Varsity Ford-sponsored Mustang this season and has his sights set on bounties offered by ARP for a 6-second pass and JESEL valvetrain for a 200mph pass.
Images and video courtesy of Evan Smith and his REVan Evan Youtube Channel
Holbrook is a familiar face in the NHRA and among Ford fans. He is a well-known and long-time high-performance engine builder as well as the owner of Holbrook Racing Engines, specializing in Ford powerplants. Additionally, Holbrook has an extensive history working with Ford Performance Parts, and he has plenty of drag racing experience having competed in Pro Stock and Factory Showdown. His Factory X entry is an S650 Ford Mustang body on a Jerry Bickel Race Cars chassis. Factory X cars use a four-link rear suspension setup and the chassis are built to SFI 25.1, 25.2, and 25.3 specifications depending on the weight of the car. The car sits on Lamb coilover struts in the front and Menscer Motorsports coilovers in the rear. Rolling stock consists of Weld Racing wheels with double beadlocks in the rear with Hoosier 33×10.5-inch slicks providing traction. Helping to slow the car down and save weight are Lamb carbon fiber brakes. Unlike the Factory Showdown cars’ 3,500-plus pound minimum weight, Factory X cars are much lighter at 2,600 pounds.
In Factory X teams are allowed to run 2019-model-year and newer cars from the big three auto manufacturers. The three models of cars currently allowed are the Chevrolet COPO Camaro, Dodge Challenger Scat Pack, and the Ford Mustang Cobra Jet. All three vehicles are powered by supercharged engine combinations, with the Ford Mustang entry utilizing the Cobra Jet’s 302 cubic-inch engine and a 3.0-liter Whipple supercharger.
Holbrook builds his…
Click Here to Read the Full Original Article at DragzineDragzine…