Add to Cart Quick view Rotor 28-129 303-12021 28-129 MSRP: Now: $150.27 Was: RotorReplace OEM(s): DelcoFor: Delco 21SI Series 90-115A IR/EF AlternatorssUsed On: Delco 21SI AlternatorsAmps: 100/115 AmpsAmps Draw: 6.8 AmpsAmps Low Output: 100 AmpsBody OD: 4.244in / 107... MSRP: Now: $150.27 Was: Add to Cart Quick view