Curb Agajanian Performance Group - NASCAR Winston Cup

NASCAR Winston Cup

The 43 car began running when Curb began fielding NASCAR entries in 1984. He hired seven-time champion Richard Petty to drive the car; with Petty bringing his STP sponsorship with him. Petty won his final two Cup races with the team and finished tenth in the final championship standings. He returned in 1985, but fell four spots in the standings after posting only one top five. During the season, Tom Sneva drove the 42 car as a second entry to Curb at Atlanta Motor Speedway, finishing 32nd after an engine failure.

In 1986, Petty and STP left to rejoin Petty Enterprises, and Ron Bouchard became Curb's new driver, switching to the #98 with Valvoline sponsorship. They ran a limited schedule and had top-ten finishes at the Daytona 500 and Winston 500, but struggled with engine problems during the second half of the season. Dale Jarrett drove the 98 at Bristol Motor Speedway, bringing Busch sponsorship, starting 28th and finishing 29th. The following year, they began running Buicks and qualified for three races with Ed Pimm. Pimm did not finish any of those races, and only managed a best finish of 27th.

Sunoco became the team's new sponsor in 1988. Pimm qualified for two out of the first three races of the season, but was replaced by rookie Brad Noffsinger. His best finish was 14th at his series debut in Atlanta. Curb Racing folded at the end of 1988.

Curb returned in 2011 to field a car for Austin Dillon with assistance from Richard Childress Racing. The team is scheduled to attempt the fall Kansas race. This would be Dillon's Cup Series debut.