Now available!!!! Cyclemos Speed Shop proprietary performance valve spring kits! These springs were painstakingly researched, manufactured, and then tested in our own race equipment. They were designed for maximum seat pressure and a spring rate of 250 pounds. This spring can be run in ANY APPLICATION.... including big twin sidevalve motors! . If you are looking to upgrade your stock 45 .... or your TROG racer.... bonneville land speed bike... or your factory wr/wldr ... these are the springs for you! This is what I run in ALL of my engines ... including the infamous trog winning KNUCKLEBUSTER 45. You can always see these springs in action on my videos on Facebook (Mike Silvio) and on instagram (Cyclemos)

We highly recommend these spring kits when running our high lift Cam profiles. Make sure to check out our other performance products available for your hotrod 45! The free length of this spring is 2.530” and has a length of 1.488” at coil bind.