The two-piece Cooper S front pulley assembly used this steel/rubber outer ring to reduce vibration. It can be bolted to the original AEG0454 steel v-belt pulley or the toothed C-AEG455 pulley for Gilmer belt accessory drive. Use C-AHT0146 locktab for either installation.
NOTE: This damper must be balanced to the front pulley before installation on the engine. It is a new part, not relaminated.