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Part # : MD6014

579 123″ BBC Underbody Exhaust Cab/Sleeper Kit

For 2013+ underbody exhaust Peterbilt 579 long hood (123″ BBC) and 567 set-back axle long hood (121″ BBC) models. For 72″ sleepers without extenders. Plain (no lights). 2.5″ wide. 2 block heater cutouts.

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Part # : MD3006

579 123″ BBC Underbody Exhaust Cab/Sleeper Skirt Kit

For 2013+ underbody exhaust Peterbilt 579 long hood (123″ BBC) and 567 set-back axle long hood (121″ BBC) models. For 72″ sleepers without extenders. X2AG2 LED lights. Block heater cutout. 2.5″ wide.

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