The BD Power 6.4L UpPipes kit that includes thick-walled exhaust manifolds that have the 90-degree outlet elbow cast design allows owners to replace the stock thin-walled 6.4L feed pipe with its elbow that burns through quickly. BD manifolds hold in exhaust gas temperatures enhancing turbine pumping efficiency, while the runners have been optimized to improve velocity and evacuate the cylinders. Manifolds are coated to resist corrosion and are pre-drilled for pyrometer probes. The 304 Stainless Steel feed pipes are mandrel bent flow designed to improve exhaust velocity and turbo response time. Kit comes with A/C adapter to offset and eliminate burning of the A/C hose. (800-887-5030/ www.dieselperformance.com)