JEGS 4" dual exhaust system for turbo diesel pickup trucks add improved fuel economy, horsepower, torque and a unique look. We begin with a 4" down pipe off of the turbo into a 5" expansion chamber followed by 5" intermediate tubing into the muffler. The muffler features all aluminized and welded construction and exits into a y-pipe. The over axle and tailpipe sections are 4" and exit at a 45° angle at the rear corners. All tubing is 4" 15 gauge and 5" 16 gauge aluminized CNC mandrel bent design for strength and longevity. For use on stock or modified vehicles however the biggest gains will be made with a programmer and a high flow intake system. Fits 2/4WD and 3/4 or 1 ton pickups only. Hangers, clamps and hardware included. .