6 0 Jacobsen 340B Engine Part for Caterpillar 3406E $500 USD (GOOD USED) Jacobs 340B Engine Brake for Caterpillar 3406E Diesel Engine, for sale!!!! Part # 024444; Stock #: JB1020 (EACH JAKE BRAKE IS SOLD INDIVIDUALLY!!!!!) For more information about... ConditionUsedFits To Make(s)CaterpillarFits To Model(s)3406EPart Number024444Stock NumberJB1020 MLS Number13713056CategoryEngine Miscellaneous Parts Last Updated7/21/2025 LocationHialeah, FL, US Sold ByJJ Rebuilders Inc. (844) 385-___ SHOWNUMBERCall Seller Email Seller Save More Info