289-351W Hydraulic Roller Valve Spring Kit

The Trick Flow® Valve Spring Upgrade Kit (TFS-2500100) is engineered to provide a significant enhancement for your engine's valvetrain, specifically designed for upgrading factory Ford 289-351W cast iron cylinder heads. With a maximum valve lift capability of 0.540 inches, this kit is suitable for use with hydraulic roller camshafts, offering a robust solution for those seeking improved engine performance. The springs themselves boast a rate of 358 lbs./in., with a seat pressure of 118 lbs. at an installed height of 1.800 inches, and an open pressure of 330 lbs. at 1.200 inches. The kit also includes steel retainers and locks, and Viton fluoroelastomer valve stem seals for the 0.341-inch guides. The kit is sold as a complete set, ensuring all necessary parts are included for a successful installation. Instructions are provided to guide you through the process.