BD exhaust manifolds have heavy walled elbow connections preventing burning out, plus, 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. BD's exhaust manifolds are not only built to last, they are designed for the most optimal flow performance. The 304 Stainless Steel feed pipes are mandrel bent flow designed to improve exhaust velocity and turbo response time. Kit comes with exhaust manifold gaskets, turbocharger pipe gaskets and A/C offset adapter to eliminate damaging the A/C hose. FEATURES Larger diameter 304 stainless steel uppipes includes internally shielded stainless steel expansion bellows Exhaust manifolds with heavy walled elbow connections prevent burning out Holds in exhaust gas temperatures enhancing turbine pumping efficiency Manifolds coated to resist corrosion Optimized to improve velocity and evacuate the cylinders 304 Stainless Steel mandrel bent feed pipes Comes with exhaust manifold gaskets, turbocharger pipe gaskets and custom A/C hose Pre-drilled for pyrometer probes INSTALL TIME 12 Hours Needs 1041480 Manifolds WARRANTY Parts 36-Months 75,000 Miles NOTE A/C tubining is disconnected during install Not for sale on licensed California vehicles VIDEOS The BD Diesel Difference What Does It Take To Create Performance Manifolds?