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401B Jake Brake Cummins Engine brake Housing Loaded 13121 13122 Big Cam 365 400
Complete 401B Jake Jacobs Brake Housing. 401B Jake Brake Cummins Engine brake Housing Loaded 13121 13122 Big Cam 365 400 High HP motors. Used on many Big Cam 2 & 3 engines. Also early BC 4 engines.