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Part # : MD9121
72″ cab/sleeper/extender – 579 123″ BBC with cab exhaust
For Peterbilt 579 long hood (123″ BBC) and 567 set-back axle long hood (121″ BBC) models with cab exhaust. Cab/72″ sleeper and extenders. Skirts measure 3″ wide. X2ACG2 LED lights. Block heater cutout.
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