CATERPILLAR JAKE BRAKE MODEL # 312 A S/N 312 A 229132 Housing P/N 021078. The item "CAT Caterpillar C10 C12 Engine Jake Brake 312A" is in sale since Sunday, June 4, 2017. This item is in the category "eBay Motors\Parts & Accessories\Commercial Truck Parts\Engines & Components\Complete Engines". The seller is "rosy1med69" and is located in Oxnard, California. This item can be shipped worldwide.