I have the ARS/FX +2 LT front end with 20" Custom Axis, I chose the ARS/FX front end for ground clearance. BTW: The Elka LT front shocks were running for more $$$ than the Axis when I was shopping around.
'03 KFX-400: Yosh RS-3/11k CDI, JD Jet, PRM skid/Smt, Pro-flow, Pingel t-kill, Hmetr, IMS tank, LED tail, Casesaver, Hipers/Razr2's, Hotcams, Houser 1.25"LT, FCR40, PrArmr Nerfs, TT X-bar, ARS/FX +2"LT, +1 stem, Custom Axis, RPM Dom, Oury, Machinist MCCT, (In works: port/polish, 12.1:1, valvesprings, gussets)