1968 - 1972 Corvette D-Port Ceramic Coated Ramhorn direct replacement Headers with inside Copper Coating for Cooler Engine Bay Temperatures. Includes Alternator Bracket. You won't find these headers anywhere else as they were developed, and are made here at McJacks Corvettes. As you can see these are direct replacement for the old Ramhorn Manifolds that GM has been making forever. These are 1 3/4' 16 guage mandrel bent tubing to a 2 1/2' Collector. These will give you more power, and only found here at McJacks