This exhaust manifold was precision-engineered and durably manufactured to match the fit and function of the original manifold on specified vehicles. It includes all necessary gaskets and downpipe hardware for a complete repair. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Chevrolet P30: 1996, 1997, 1998, 1999] - [Chevrolet W3500 Tiltmaster: 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003] - [Chevrolet W4500 Tiltmaster: 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003] - [GMC P3500: 1996, 1997, 1998, 1999] - [GMC W3500 Forward: 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003] - [GMC W4500 Forward: 1998, 1999, 2000, 2001, 2002, 2003] - [Isuzu NPR: 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003] - [Isuzu NPR-HD: 1999, 2000, 2001, 2002, 2003] - [Workhorse Custom Chassis P42: 2000, 2001, 2002, 2003, 2004] - [Workhorse FasTrack FT1061: 2002, 2003, 2004] - [Workhorse FasTrack FT1260: 2000, 2001] - [Workhorse FasTrack FT1261: 2002, 2003, 2004, 2005] - [Workhorse FasTrack FT1460: 2000, 2001, 2002] - [Workhorse FasTrack FT1461: 2002, 2003, 2004, 2005] - [Workhorse FasTrack FT1600: 2000, 2001] - [Workhorse FasTrack FT1601: 2002, 2003, 2004, 2005] - [Workhorse FasTrack FT1800: 2000, 2001] - [Workhorse FasTrack FT1801: 2002, 2003, 2004] - [Workhorse FasTrack FT1802: 2002, 2003] - [Workhorse P30: 2000, 2001, 2002, 2003, 2004, 2005] - [Workhorse P32: 2001, 2002]