This Flowmaster® American Thunder® Cat-back System is for 1998-2001 Dodge Ram 1500 trucks with 3.9L, 5.2L or 5.9L engines and 1998-2002 2500/3500 trucks with the 5.9L engine, and all wheelbases. Manufactured using durable aluminized steel, the kit features two adapter pipes that flow into the 70 Series Big Block II™ performance muffler for a deep mellow tone with minimal interior resonance. The single 3.00 in. mandrel-bent tailpipe uses the factory hanger locations for easy mounting and exits on the passenger side of the vehicle behind the rear wheel which is ideal for towing. Includes all necessary parts and hardware for an easy bolt-on installation. Covered by our 3-year Limited Warranty. Notes: Fits both 2 & 4 wheel drive models and all wheelbases.