S2000 Upgrades Valve Springs | Performance Upgrades for Automotive Applications. Take a look at the Valve Springs we sell from top brands including Blox Racing, Brian Crower, Eibach and Manley. We sell Valve Springs for vehicles including Honda. We offer Valve Springs for applications including Honda S2000 and more. Select your vehicle from the search filter below to view Valve Springs by vehicle make, model and year.