IsuzuN-Series Classes 3 and 4 models are powered by a direct-injected 6.6-liter V8 engine with variable valve timing that generates 350 horsepower and 425 ft.-lbs. of torque. They are available in both standard cab and crew cab configurations, with gross vehicle weight ratings (GVWR) from 12,000 to 14,500 lb. and wheelbases ranging from 109” to 176” to accommodate bodies from 10” to 20”.