Where can I buy the FS 4-1 header for cheap? Also, How much louder will my car be with this header, a 2.5'' flexpipe, and a 2.5'' borla exhaust? It won't attract the cops will it? Also, anyone know if this is a good idea being that I live in California and all? I am planning on just putting the stock stuff back on when it comes time for emissions testing. Thanks for the help.