We have put together the complete package to secure your flex plate to the crank for your high performance diesel. After years of struggling to keep the flex plate from coming loose, this combination/technique is the only thing that has kept ours tight. Tried and tested above 2000rwhp. Kit will come with everything needed along with instructions to ensure your install is done correctly. Works on factory 94-18 Cummins crank You will have to check thread depth prior to install.