DougThorley’s new stainless steel, direct bolt in cat delete pipes for new Nissan Patrol 5.6L will increase the horse power and torque of the engine. 100% U.S. made. DougThorley cat delete pipes are added with mufflers which helps provide up to a 4 dbA sound reduction, on most race applications, while maintaining a deep race tone. The unrestricted, lightweight, straight-through design is dyno tested and track proven.
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