BD Diesel Performance's 6.4L Ford Super Duty diesel UpPipes kit includes thick-walled exhaust manifolds featuring a 90-degree outlet cast elbow design replacing the stock thin-walled 6.4L feed pipe that can be prone to burn-through. BD manifolds are designed to hold in exhaust gas temperatures, enhancing turbine pumping efficiency, while the runners have been optimized to improve velocity and evacuate the cylinders more effectively. Manifolds are coated to resist corrosion and are pre-drilled for pyrometer probes. The 304 stainless-steel feed pipes are mandrel bent, with flow designed to improve exhaust velocity and turbo response time. Kit comes with A/C offset adapter. Suggested retail $895.