​Supertech valve springs are computer designed to ensure smooth harmonics under high RPM and load. The stress levels are kept under control and fatigue is reduced for long durability under extreme conditions. These springs are made of premium Superclean Chrome Silicon Vanadium steel alloy, which is a tough alloy that was designed for higher performance and durability at high RPM's and memory retention.

Specs:

* Outer Spring O.D.: 27.50mm
* Outer Spring I.D.: 20.00mm
* Inner Spring O.D.: 20.00mm
* Inner Spring I.D.: 15.20mm
* Seat: 84 @ 35 (lbs@mm)
* Open (lift): 202 @ 10 (lbs@mm)
* Max net lift: 12.00mm
* Coil bind: 20.70mm
* Rate: 12.70 lbs/mm

Kit Includes:

Supertech Dual Springs
Supertech Dual Spring Titanium Retainers
Supertech Spring Seats
Supertech Viton Valve Seals