BBK's new headers for '05-'07 Mustang GTs come with all the usual related installation hardware such as bolts, collector studs, flat washers, lock washers, and nuts. New gaskets are also provided. Part number 1612 is the standard finish, while 16120 is a ceramic-coated finish. Installing headers on the current Mustang is considerably easier than the previous-generation SN-95 car due to the overall larger size of the S197 platform. There's simply more room to work. While it still takes a while to do the job (about 4-6 hours), the added workspace is a welcome change.