1.400 Dual Valve Springs Nek Tek Series

The 1.400 Dual Valve Springs Nek Tek Series are precision-engineered components designed for serious engine builders and performance enthusiasts who demand reliability under extreme valve train stress. These dual valve springs represent the evolution of high-lift, high-RPM cylinder head technology, engineered to maintain consistent spring pressure across a wide rpm band without sacrificing durability.

Built for naturally aspirated and forced induction applications, they are the foundation of any stroker, turbo, or supercharged build that requires controlled valve actuation and consistent seating force. The 1.400-inch outer diameter profile of these dual valve springs allows for increased installed height and seat pressure while maintaining a compact envelope compatible with most OEM and aftermarket cylinder heads. Utilizing premium alloy steel with controlled rate geometry, these springs prevent coil bind and ensure predictable spring force delivery from idle through maximum valve lift.

These springs suit builders upgrading cylinder heads for big-valve conversions, solid roller camshaft installations, and extended-RPM street and race applications. The dual-spring configuration distributes load more evenly across the valve seat, reducing fatigue and micro-movement that degrades sealing surfaces. This design maintains consistent preload under thermal cycling, critical for engines operating at sustained high temperatures and boost levels.