This Hooker Blackheart exhaust system is ideal for 2WD (4WD is available - BH14348) GM C1500 "OBS" projects that are planning on running a GM LS or LT engine but will work with nearly any V6 or V8 engine swap for this GMT400 chassis. Pair with swap exhaust manifolds (8502HKR, 8503HKR, BHS516, etc.) and adapter pipe kit BH14350 to accomplish two things: 1) fill the gap between the end of the manifold and 2.50-inch inlet Hooker Blackheart exhaust system and 2) easily incorporate a catalytic converter. These parts were intended to work together and for compatibility with Hooker Blackheart engine mounting brackets listed for this vehicle application only. They are designed to provide the user with a means of installing the factory catalytic converters from a 1999-2006 5.3 or 6.0-liter Chevy Silverado truck (4.00-inch maximum diameter), into this vehicle application, within the stipulations/requirements published by CARB/EPA for emissions-legal engine changes. The ability of the final fabricated assembly to satisfy these requirements should be confirmed with local/state authorities prior to the installation of these components. *Although listed as ending in 1998, this exhaust will fit the classic trucks and SUVs that continued on into 2002 with the same GMT400 chassis.