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.