Valve Spring Kit. Fits Big Twin 1984-2004, Sportster & Buell 1986-2003. Steel Double Springs with .675in. Lift. Titanium Retainers! - AV&V

* Extreme Duty Valve Spring Kit - Titanium Retainers - .675" Lift

* Specifically designed & processed with extra shot peening & nitrided to resist failure under the most extreme conditions.

* For use with serious high performance cams 0.640-.675" lift

* Includes springs,retainers & upper & lower collars

* 185lbs @ 1.860, 460lbs @ 1.160"

* Coil bind 1.080"

* Maximum lift = .675"

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.