Require use of Fuel Filter spacer. Recommended PPE 113059320 Fuel Filter spacer or equivalent. PPE High-Capacity Premium Efficiency Fuel Filter - the ultimate protection for your Duramax's fuel injection system. Engineered to deliver unrivaled protection, this advanced filter sets new standards in performance and reliability. Featuring a 100-pleat, 6.25-inch-tall extra fine 2-micron filtration media, the PPE Filter offers 75 percent more area than the stock filter. To enhance durability and longevity, we have upgraded the base plate to a full-aluminum design to replace the stock plastic component. Our upgraded full-aluminum half-inch drain cock, complete with a rubber seal, enables hassle-free water drainage. The PPE Filter's nylon center tube provides robust support and built-in water separation, ensuring clean fuel and optimal engine performance. The PPE High-Capacity Premium Efficiency Fuel Filter provides ultimate protection and prolonged performance. Upgrade now.