Series 2 Pro-wet tuned combination manifold and header. We have just incorporated the exhaust manifold and header into a one-piece unit designed to  be used with wet "internally-cooled" tuned exhaust pipes such as our pro-wet tuned pipe.  You can use this header to direct a wet exhaust exiting through the transom on the left side of the boat or combine it with our wet-tuned pipe to complete a wet-tuned exhaust system.