Maurice Petty (March 27, 1939July 25, 2020) was an American NASCAR crew chief and engine builder. He worked for Petty Enterprises, of which he was part owner. He was added into the International Motorsports Hall of Fame in 2011. He was honored into the NASCAR Hall of Fame in 2014. He was the first engine builder to be honored in that Hall. Petty was born in Randolph County, North Carolina. Petty was the younger brother of Richard Petty.