AUTOS: Hennessey Bumps ZL1 To 1,021 HP

California performance builder offers upgrade packages that boost the Camaro's horsepower a little or a lot.

Source: http://automotive.speedtv.com/article/autos-hennessey-bumps-zl1-to-1021-hp/

Dale Arnold Jarrett Jimmie Kenneth Johnson Kasey Kenneth Kahne Matthew Roy Kenseth Alan Dennis Kulwicki