BBK Performance Parts Vari-Tune Exhaust Systems deliver maxium horsepower, torque and sound to your late model muscle car. BBK's Vari-Tune Exhaust Systems feature fully sound adjustable vari-tune mufflers that can be tuned by simple moving an intergrated adjustment screw. Choosing sound and horsepower output makes these exhaust truly one of a kind and unique to your vehicle. Included with these systems are polished exhaust tips and hardware for installation. These bolt-on exhuast systems provide the best of both worlds, for street and track use.