Mike, the limefire name on that style of header comes from the name of a '32 roadster built by Pete Chapouris in the early '80's. His roadster was painted a brilliant lime green color, and was flamed, thus the name. Even though this style of header dates way back, mostly used by lakes racers for a method of quick open exhaust access, Pete's car has come to be the identification for this style. If his name is not familiar to you, he was the Pete in "Pete & Jake" hot rod parts, and is currently the major domo at SoCal Speedshop. A very nice, and obviously talented, guy as well.