Beehive spring and Titanium retainer Kit to suit 6mm stem Ferrea Valves F1934P and F1936P.
\nIntake: 86lb seat pressure at 37.00mm installed height.
\nExhaust: 89lb seat pressure at 38.65mm installed height.
\nCoil bind 22.85mm.
\nFit 1.5mm shim on top of factory spring base. Must use K10063-24 locks.