Manley NexTek Performance Valve Spring

Manley NexTek performance valve springs are engine valve springs built for high-performance and racing engines. They are designed to keep the valvetrain stable at high RPM. The NexTek line includes dual and triple spring designs, so engine builders can match the spring to the cam profile and application.

Key Features:

• Premium material: Made from clean, high-tensile chrome silicon alloy for strength and fatigue resistance.
• Shot-peened: Shot peening to MIL specs extends fatigue life.
• Heat treatment: A multi-step heat-treating process helps limit load loss over long periods of use.
• Lightweight, compact design: The smaller diameter and lower mass help the engine rev higher and improve valvetrain control.
• Computer-aided design: Modeling is used to reduce valve bounce and valve gear separation.
• Extended tip thickness and controlled end flatness: The extended tip is intended to prevent overload breakage. Tightly controlled open-end flatness reduces valve stem side loading.
• Chamfered inside diameter: The chamfer provides clearance for the retainer.

NexTek springs have been tested on the Spintron, on the dyno and at the track. They suit drag racing, oval track and endurance racing, and naturally aspirated or forced-induction builds that use aggressive cam profiles. They are meant to hold spring pressure through the late stages of a race, which gives better valvetrain stability and longer component life.