Straight-through, or flow-through, mufflers have perforated baffles and packing material that provides a conservative level of sound absorption while still keeping sound output moderately loud. Glasspack mufflers perform similar to resonators due to their design and lack of sound-absorbing packing material, so they tend to be louder and higher pitched. For compression-ignition (i.e., diesel) engines, the most commonly used catalytic converter is the diesel oxidation catalyst (DOC). This catalyst converts particulate matter (PM), hydrocarbons, and carbon monoxide to carbon dioxide and water. These converters often operate at 90 percent efficiency, virtually eliminating diesel odor and helping reduce visible particulates. These catalysts are ineffective for NOx, so NOx emissions from diesel engines are controlled by exhaust gas recirculation (EGR).

You get the only the best with SPD's 3” resonator 2016 cummins delete pipes. These aluminized steel pipes are 3” .. SPD's high performance resonator cat-back pipe replaces your factory resonator pipe with a true 3” p.. The welds and craftsmanship are top notch, and the tips look perfect.

If you've got questions about cat-back exhaust systems, pipe diameters, muffler type, or anything else, talk with our product specialists. All 1995 model year vehicles, and all 1992 model year or earlier vehicles. All model year vehicles that were manufactured with EPA or Federal emissions certification. Exhaust gases from the cylinders are collected in the exhaust system to prevent harmful fumes from entering the vehicle.

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