2 0 Caterpillar C12 Engine Brake for a Caterpillar C-12 $175 USD Used take off Caterpillar C-12 Jake head. Part number: 021078 Quantity32ConditionUsedFits To Make(s)CATERPILLARFits To Model(s)C-12Part Number021078Stock NumberRyd 021078 MLS Number10687865CategoryEngine Brakes / Jake Brakes Last Updated11/3/2025 LocationFitchburg, MA, US Sold ByRydemore Heavy Duty Truck Parts (888) 519-___ SHOWNUMBERCall Seller Email Seller Save More Info