BD Diesel CAT 99-98 3406E / 99-03 C15 Road Master Exhaust ManifoldAre you thinking of replacing your stock C15 3406E turbo with a more reliable and affordable unit? Then you will need a dependable exhaust manifold to mate up to it. BD's exhaust manifolds are constructed of thick walled, durable high silicon ductile iron which with their 3 piece design will prevent cracking and help reduce future repair costs and down time. The T6 mount allows for a variety of turbos that can be installed including BD's own