Want to step it up a level with your RFY shocks? The use of springs with a 1 7/8″ inside diameter (ID) is a great way to do that. Get the huge range of springs offered not just by RaceTech by many other manufacturers simply by using this kit. The kit consists of a set of specially selected o-rings that help center 1 7/8″ ID springs on the RFY perches. The o-rings are extremely durable, are extremely easy to fit during the spring changing process, and offer the most affordable solution on the market.