This low-profile fuel gauge replaces the analog readout with bright LED lamps. The six edge-mounted LED lamps glow blue when the tank is full and extinguish one by one as fuel is consumed. Plug-in installation without splicing. Photocell automatically adjusts LED brightness for improved visibility in direct sunlight and dims at night to avoid distraction. Fits '04-'08 FXD35, FXDB, FXDF, FXDL and FXDWG, '07-'08 FXDC, '04-'07 Softail, '01-'03 EFI Softail (except FXSTDI), '03-'07 Road King and '01-'02 EFI Road King models.