This TPS bolt upgrade kit comes with (2) Allen Head Screws, (4) Washers and a Ball Head Allen Wrench. This Kit was designed to replace the stock Phillips Head Screws with Allen Head Screws. The stock screw length varies slightly from year to year so we supply you with the longest stock length screw. You can use the supplied washers to shim the new bolts as needed. Make sure that you adjust your throttle position sensor after installing these new bolts.