Diamond Eye Performance Diesel Exhaust Systems

Diamond Eye Performance Diesel Exhaust Systems

Diamond Eye Performance manufactures mandrel-bent exhaust systems and components for diesel trucks, with a catalog that spans DPF-back, turbo-back, and cat-back exhaust for Cummins, Duramax, and Power Stroke platforms. CNC mandrel bending maintains full internal tube diameter through bends from 3/8-inch to 5-inch OD in both aluminized and stainless steel, ensuring exhaust gas flow is not restricted by collapsed bends common in lesser exhaust systems.

Popular Upgrades

Diamond Eye 4-inch DPF-back exhaust systems for the Cummins 6.7L and Duramax 6.6L diesel trucks are the most popular products, providing a meaningful reduction in exhaust restriction over the factory 3.5-inch outlet section. Stainless steel mandrel-bent kits are available for the Ram 2500, Ram 3500, Ford Super Duty, and GM HD truck platforms with direct-fit connections and tip options. Aluminized exhaust kits offer the same mandrel-bent quality at a lower price point for builds in drier climates where corrosion is less of a concern.

What is the advantage of mandrel bending in exhaust systems?

Mandrel bending uses an internal mandrel rod inside the tube during the bending process to prevent the tube walls from collapsing or wrinkling at tight radius bends. This maintains the full internal diameter through every bend rather than reducing it as crush-bent exhaust does. On a 4-inch exhaust tube, a crush bend can reduce internal diameter to less than 3 inches at the apex, significantly restricting flow and increasing backpressure at high engine loads.

Does Diamond Eye make exhaust for gas trucks?

Diamond Eye's primary focus is diesel truck exhaust, but they do manufacture select exhaust components for gas-powered applications. The diesel lineup for Cummins, Duramax, and Power Stroke platforms is the core catalog, with sizes from 3-inch to 5-inch available in multiple configurations including DPF-back, downpipe-back, and full turbo-back systems for maximum diesel performance.

Find diesel exhaust at Black Ops Auto Works. Browse our full exhaust systems, air intake systems, and suspension upgrades for your diesel build.