They are Road and Track. Built to Order for the F. So yeah, heavier rated springs.
1992 Toyota Supra
MoTeC M820. Dry sump 2JZ. GTX4294R
844RWHP @ 26 psi on Race gas
2013 UW IS-F, FIGS LCA and links, Hotchkis sway bars, Ohlins Road & Track coilovers, RB 2-piece rotors, Advan RG-D's. OS Giken superlock LSD. Apexi Smart Throttle Controller. ISS Forged F10-R 19x9.5 and 19x11 coming soon!
2005 IS300. Silver. Black leather interior. LSD