At least 50 Challenger Drag Race Package Cars were built to meet NHRA requirements. Engine options include a 6.1 L Hemi, 5.7  Hemi, and a 5.9 L Magnum Wedge. Manual or automatic transmissions are available, and the rear axle is solid (not IRS). An initial run of the required 50 cars was completed and over 100 of the "2009 Challenger Drag Pak" vehicles were produced. "Big Daddy" Don Garlits bought the first drag race package car and raced it in NHRA competition. The prototype cars shown at SEMA were built by MPR Racing of Michigan, who continue to modify the production cars as delivered from Chrysler.