Part # : MD9022
579 123″ BBC Underbody Exhaust Cab/Sleeper Kit
For 2013+ Peterbilt 579 models with 123″ BBC and underbody exhaust. For 44″ sleepers without extenders. X2ACG2 LED lights. 2.5″ wide. 2 block heater cutouts.
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Part # : MD6013
579 123″ BBC Underbody Exhaust Cab/Sleeper/Extender Kit
For 2013+ underbody exhaust Peterbilt 579 long hood (123″ BBC) and 567 set-back axle long hood (121″ BBC) models. Cab and 80″ sleepers with extenders. X2ACG2 LED lights. 2.5″ wide. 2 block heater cutouts.
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