2022 Mack LR Engine: 10.8L L6; Position: Alternator;. 2021 Mack LR Engine: 10.8L L6; Position: Alternator;. Fits 2021-2022 Mack LR. Part Type: Serpentine Belt. Position: Alternator. V-RIBBED BELT. To confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in theCompatibility Table.
