730026 Fits Evolution Big Twin 1984 Thru 1999 Evolution Sportster 1

These Kibblewhite Precision Machining valve spring kits are designed for high-performance Harley-Davidson models including Dyna, FX, FXR, Softail, and Touring bikes. Engineered for high-lift cams up to .690", these springs allow for pressure settings between 180 and 230 pounds. This makes them suitable for a wide range of builds, from mild street cruisers to high-output strip burners. Each kit is sold as a set and features four double racing valve springs, four hard-anodized lower collars, and four retainers made from either titanium, steel, or aluminum alloy. The inclusion of four pairs of 15-degree machined keepers ensures a precise and secure fit. By using lightweight, race-grade materials, Kibblewhite helps reduce valve train mass, which is essential for maintaining stability at higher engine speeds.