Valve Spring Kit. Fits Twin Cam 2005-2017, Sportster 2004up. Beehive Springs with .650in Lift

Note: Maximum Recommended Lift = .650in.

* Beehive steel valve spring kit* Use with AV-V7MMB guide seals

* Fits both Single & Triple groove valves

* Ultra pure chrome silicon + Nickle spring wire

* Extra processing for fatigue resistance

* Resist pressure loss & fatigue associated with extremely aggressive cams in high compression engines

* Reduce vibration & harmonics

* Includes springs, retainers & upper & lower collars

* 175lbs @ 1.860, 370l bs @ 1.250in.* Coil bind 1.150in.

* Small end ID = .740in., OD= 1.185in.* Large end ID = 1.055in., OD = 1.500in.

* CNC machined keepers

Tech Tips:-* Rocker box clearance must be checked

* Spring travel must be checked

* Valve timing must be accurate*

* Over revving will lead to pre-mature failure of Valve Springs & collars.