.650in. Lift Endurance Beehive Valve Spring Kit. Fits Twin Cam 2005-2017 & Sportster 2004-2021. - Feuling RR Shocks Related - XL'04up * YKK zippers in underarm

* YKK zippers in underarm area for ventilation

* Sound is tailored to cut through exhaust and wind noise when bike is at speed

* Old style logo was Mill Engraved

12 pistons

* Ring Fitment Instructions must be followed carefully

.650in. Lift Endurance Beehive Valve Spring Kit. Fits Twin Cam 2005-2017 & Sportster 2004-2021. - Feuling RR Shocks Related - XL'04up * YKK zippers in underarmFEULING Endurance BeeHive valve springs are machined from a premium grade Hi tensile chrome silicon single conical ovate wire, shot peened with a specially processed thermal heat treat and super NexTex finish to give these valve springs the needed fatigue life to exceed the high demands of V Twin engines from stock to performance. Kits include: FEULING endurance BeeHive valve springs, lightweight super Titanium heat treated retainers, machined chrome