Designed by the Shelby Skunkworks team at the Chrysler/Shelby Development center in Santa Fe Springs, CA in the mid 80's this exhaust manifold was created for a prototype Naturally Aspirated DOHC 16v Chrysler/Lotus 2.2 engine.  Has thermocouples located in each runner to monitor EGT's and backpressure.  Very nice piece made out of cast iron.  A very rare little piece of Shelby/Dodge history.