The Nightrun Garage 4age oil pump upgrade screws are a must when building your 4age. Many people port the 4age oil pump to optimize flow which requires taking the back cover of the oil pump off. Our high-quality, fully thread, 90º countersunk screws come with a hex drive instead of JIS and which makes re-torquing them a breeze. These screws are high strength, 10.9 grade zinc plated alloy steel. Our price includes all (5) screws.