These Gibson diesel exhaust systems are designed to decrease backpressure, reduce exhaust temperatures, and allow the engine to produce more torque and horsepower. Dyno-tested results have proven increases of as much as 32 hp and 60 ft.-lbs. of torque. They come in your choice of aluminized heavy-duty tubing for extended durability and longer life or 409L stainless steel heavy-duty tubing. The single cat-back exhausts feature a large 4 in. mandrel-bent tailpipe that maintains constant exhaust flow through the bend for outstanding performance. The included Superflow muffler offers a straight-through design and is fully welded, baffled, and chambered for better volume efficiency and unrestricted flow (it's not packed or screened, so there's nothing to blow out). These systems also feature a giant 5 in. T-304 high polished stainless steel slash tip, zinc plated 3/8 in.-1/2 in. thick factory-style hangers, zinc plated heavy-duty clamps, and are 50-state emissions legal. They will not affect your factory warranty. The single turbo back exhaust systems include all of the above, plus a large-diameter downpipe from off the turbo.
