Optimize your 4.4L engine with the New Zeki GT2256S Turbo T1636-01 . This GT2256 model turbocharger, crafted by Zeki, is new and comes with a 1-year manufacturer's warranty. It's designed for enhanced efficiency and power, making it a superb choice for engine upgrades. Cross-reference numbers include 762931-5001S, 320-06047, and 320/06047.