Corey, good luck with the sale of your Carrera. Hey, I have a question for you. When I got my 257 a couple of years ago, the rigger told me that the CMI's wouldn't fit a 257 so he talked me into going with Lightenings. Now, that I have the bigger motor, I would like to go with a larger internal diameter header and CMI has the 2-3/8" ID pipe but I don't know if it will fit my 257. Any thoughts? R/R