2-5/8" Shift Light Tachometer | 10K RPM

SKU: R25-TC4-REV
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$206.50 USD
Tracks engine RPM with a built-in warning light for clear, at-a-glance alerts. Designed to work across a wide range of engines for clean, flexible installs. Precision stepper motor delivers smooth, stable, and accurate readings.
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Order leaves our facility in about 2 Weeks

The Tachometer with Warning Light delivers clear, real-time RPM with a built-in warning light for immediate visual alerts. Designed to work across a wide range of gasoline engines, it installs clean across everything from classic builds to modern setups. The warning light provides instant feedback so you can monitor engine limits without taking your eyes off the road. A precision stepper motor keeps the needle smooth and steady—no bounce, no guesswork. Built with a durable housing and solid aluminum bezel, it’s made for real driving conditions and long-term use. Made in the USA and backed for life.

Track-Tested. USA-Built. Backed for Life.

Key Features:

  • Integrated Warning Light — settable alerts for engine limits
  • Wide Engine Compatibility — supports 1–12 cylinder and a broad range of tach signals
  • Accurate RPM Monitoring — real-time engine speed tracking
  • Microprocessor-Driven — real-time accuracy
  • Stepper Motor Precision — smooth, accurate pointer
  • Weather-Resistant Build — built for street, track, and off-road
  • Made in the USA — backed by a lifetime warranty
Download Instructions

To get into PPR (Pulses Per Revolution) calibration, you will press and hold the button down while power the gauge on (or menu button if you have 2 on the front)

You will determine your PPR based on the chart below. While in calibration, pressing and releasing the button will cycle through the options. 

After 5 seconds, the gauge will exit calibration and save the PPR the pointer is currently on, return to 0 then show the RPM reading.

If you have a dual speedometer + tachometer, then you will set the calibration on the screen display instead, holding button down while powering on, press and release button to cycle through menu options, hold the button for 3-4 seconds to select "Set pulses per rev" menu option, then press and release to increase PPR. The PPR will save after 5 seconds of inactivity.

Tachometer calibration
Engine ConfigurationDistributor-Based
(Single-Coil)		Wasted-Spark
(Distributorless / Coil Packs)		Coil-On-Plug
(COP)		OEM ECU
Connection		Aftermarket ECU
Connection
12 Cyl (4-Stroke)6 PPR1 PPR0.5 PPR2 PPR6 PPR
10 Cyl (4-Stroke)5 PPR1 PPR0.5 PPR2 PPR5 PPR
8 Cyl (4-Stroke)4 PPR1 PPR0.5 PPR2 PPR4 PPR
6 Cyl (4-Stroke)3 PPR1 PPR0.5 PPR2 PPR3 PPR
4 Cyl (4-Stroke)2 PPR1 PPR0.5 PPR2 PPR2 PPR
2 Cyl (4-Stroke)1 PPR1 PPR0.5 PPR2 PPR1 PPR
1 Cyl (4-Stroke)0.5 PPR1 PPR0.5 PPR2 PPR0.5 PPR
3 Cyl (2-Stroke)3 PPR3 or 6 PPR1 PPR3 or 6 PPR3 or 6 PPR
2 Cyl (2-Stroke)2 PPR2 PPR1 PPR2 PPR2 PPR
1 Cyl (2-Stroke)1 PPR2 PPR1 PPR1 PPR1 PPR

Calibrating single gauge tachometer:

Built to last. Backed for life.
  • Lifetime warranty on internal circuit board electronics
  • 5-year coverage on sensors and wiring
  • Applies to gauges purchased since Jan. 1, 2006

Every Speedhut gauge includes a lifetime warranty* on the electronic circuit board inside the gauge case. It is the core of the gauge — the part responsible for the precision communication that delivers the accuracy and performance Speedhut is known for.

Sensors, wiring, and other external components are covered by an unlimited 5-year warranty.

This combined lifetime / 5-year warranty applies to the original purchaser.
*For your lifetime — as long as you own the gauge — we stand behind it.
Speedhut Inc warrants products to be free from defects in materials or workmanship. This warranty is limited to repair or replacement. Speedhut Inc is not responsible for incidental or consequential damages. Improper use, installation, or unauthorized modifications void this warranty.
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