Choose your intake from the drop down menus above and to the right: ATS-INT-D24CR - BLACK ATS-INT-D24CR - WHITE ATS-INT-D24CR - SILVER The above part numbers fit the Common Rail Cummins from years 2003-06. They come powder coated in your choice of Black, White or Silver. ATS-INT-D-24V - BLACK ATS-INT-D-24V - WHITE ATS-INT-D-24V - SILVER The part numbers above are for the 24 Valve Cummins engines from years 1998.5-2002. Choose from powder coated Black, White or Silver ATS-INT-D-12V - BLACK ATS-INT-D-12V - WHITE ATS-INT-D-12V - SILVER The part numbers above are for the 12 Valve Cummins engines. They come with a 3" hump hose, and you choose from powder coated Black, White or Silver. In the never ending quest to lower EGT's and flow more air to the Cummins, you've got to change out the factory's restrictive parts. They are designed for the stock horsepower levels and restrict the much needed airflow on a modified engine. ATS has designed intakes for the Cummins engine that flow the air you need to feed the beast. Here's what ATS has to say about thier intake manifolds: The ATS Intake Manifold offers these benefits: The Arc-Flow intake manifold provides a smooth non-abstractive path for the air exiting the intercooler as it enters the engine. There is the one basic element that is required to produce power and reduce EGT's in a Diesel engine, that element is "Oxygen". Oxygen is the key element of life, and oxygen is the key to the Diesel engine. Air volume provides the necessary element to efficiently burn the fuel that is injected into the combustion chamber. The stock intake manifold on the Cummins 5.9L engine acts as a restrictor plate does on a NASCAR engine. A restrictor plate reduces the amount of air that can enter the engine limiting the overall power output. The ATS Arc-Flow intake manifold allows the air to expand at a rate that does not create turbulence as it is fed into the cylinder head. As the incomming air opens into a larger expansion area the air will tumble if expanded to quickly. The Arc-Flow intake is specially engineered to allow for maximum expansion of only 7 degrees providing a perfectly controlled expansion of air-flow into the cylinder head. The Arc-Flow also comes pre-tapped for perfect distribution of water injection. When looking for economy, towing or performance the Arc-Flow is the best add on that can be easily bolted to any Cummins 5.9L Diesel. - Lowers Exhaust Gas Temperatures - Better throttle response - Superior Arc-flow design increases intake efficiency and air velocity over that of a stock intake manifold with much greater internal cross section. (see image - right) - Ideal when upgrading your turbo. - Shrouded back side of intake is pre-tapped for easy and clean gauge installation and other auxiliary inputs. - Will not void warranty. - Pre-tapped for water injection directly above the intake plenum. Resources: Image(s): Intake Dyno Chart Stock to ATS comparison