1 0 Allison B300RRM Transmission for a 2006 Optima Opus $2,450 USD B300, 5.9 CUMMINS, WORKS GOOD,DROVE IN,INSPECTED WITH 90 DAY WARRANTY, Serial#: GET, Engine Make: Cummins, Engine Model: ISB ConditionUsedEngine ModelCummins ISBFits To Make(s)OptimaFits To Model(s)OpusWill Fit Year(s)2006Stock Number82825-2 MLS Number13789699CategoryTransmissions Last Updated8/31/2025 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info