Ultra-Shift Light™ (USL) and Gauge Ultra-Shift™ (G.U.S™) offer breakthrough performance for drag users. USL and G.U.S™ are digital tachs and LED sift lights with peak RPM that cover the full range of engine applications, with resolution to 10 RPM. No pills or modules required! Options include window switch controller and 4-shift technology (peak RPM, 4-shift recall and trap RPM). G.U.S.™ puts the digital tach and shift light into a compact 2-1/16″ gauge package.