Fast Road Double Springs direct fit no machining
Swiss silicon chrome vanadium spring steel.
Heat treated and shot peened for high RPM.
Computer aided design for low stress levels with very low Harmonics with excellent structural memory
Set of 16
Fitted length 32.7mm
Inner spring fitted length should be 31.5mm with 2.5mm step
Seat Presure 77lbs
Maximum Valve lift 11.00mm
Machining the spring seat is not required