Ford 4.6L/5.4L DOHC NexTek Series High Performance Valve Springs (4 valves per cylinder

Description

From drag strips to short track and endurance circuits, the Manley NexTek® series is engineered for serious racers. NexTek® springs resist pressure loss and valve-train degradation even in the most demanding race conditions. That means more consistent spring force deep into a run, reduced valve bounce, and improved overall stability for high-RPM performance. Built to outperform and outlast in real-world competition.

Features & benefits

• Tightly controlled open-end flatness reduces valve stem side loading
• Manufactured from “super clean” Hi-Tensile Chrome Silicon steel
• Proprietary multi-step heat treating minimizes load loss
• Tip thickness designed to eliminate overload breakage
• Shot-peened to MIL spec for max fatigue life

Magnuson-Moss Warranty Act

Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)).