Tachometer Gauge with emblem - DECO XT Ash , Red Vintage Needles, Black Trim Rings - Style Kit DIY Install. Rev up in style with Aurora Instruments Tachometers. Each tachometer offers precise stepper motor control and needle accuracy comparable to tachometers 3 times the price. Aurora Instruments programmable tachometers will work on engines with 3 to 16 cylinders - no adapters required! Aurora Instruments's unique auto-calibration design make setting up your tachometer a snap the 1st time. All Aurora Instruments tachometers include interchangeable trim rings, needles, and gauge faces - allowing you to change the look of your tachometer before or after installation. Backed by a Limited Lifetime Warranty. Aurora Instruments gauges offers the worlds largest selection of gauges and instrumentation for your ride, and are the world's only gauges offering interchangeable gauge faces, trim rings, and needles.