When installing a new flexplate, it is recommended to replace your flexplate bolts as the old factory ones can fatigue over time. These Aeroflow flexplate bolts are made from chrome moly 8740 for high strength compatibilities. They are black oxide to resist rust and corrosion. We recommend the use of Loctite 262 or similar so they won’t come loose over time. These bolts should be torqued down to each manufacturer’s specifications.