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Turbo Downpipe Back Exhaust Systems - Diesel Trucks

These Downpipe Back Exhaust Systems can increase torque while providing an awesome and aggressive sound with augmented air flow.

More on Downpipe Back Exhaust Systems from OC Diesel

In certain downpipe back exhaust systems, a catalytic converter with more flow than the original converter is included. In others, the catalytic converter is removed completely and replaced with just a pipe. Removing it will generally give an increase in horsepower, but is not legal in most states because it is considered the removal of an emissions control device.