Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
The Manley NexTek valve spring kit is engineered for high-RPM race applications across alcohol, fuel-class and ProMod engines, offering dual-spring construction that reduces friction and load loss while improving valvetrain control. NexTek springs are spintron and dyno tested to resist pressure loss and valve bounce during long runs, providing higher natural frequency and lower active mass for improved stability in demanding motorsports environments.
Manley Alcohol/Fuel Classes/ProMod NexTek Series High Performance Valve Springs
