We all know one of the weak points in the Cummins motor is the poor exhaust manifold design. To overcome that issue, the guys at Performance Diesel have designed this new manifold to reduce the risk of cracking and warping. Forged out of high molysiliconductile material, the same material used to cast turbo housings, this allows for both the manifold and turbo housing to cool at similar rates. Each ball seal manifold is finished with a high temperature coating to prevent corrosion and for a finished look. You can reach PDI at 800-511-1231 or www.pdidiesel.com.