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Quick Specs

  • Size:4" (101.6mm)
  • Type:Air-Core
  • Range:0-8,000 RPM
  • Lighting:Incandescent
  • Instructions: Download PDF


Since 1957, AutoMeter has set the standard in performance, accuracy and durability with their legendary Tachometers. The absolute pinnacle of engineering and technology, it’s no wonder AutoMeter can lay claim to more motorsports victories than every other gauge manufacturer combined. The patented air core meter movement, wound in house to exacting standards, can move the needle from 0 – Maximum RPM in 333 milliseconds. An ultra-bright LED shift light guarantees you hit your shifts perfectly, every time. An inaugural inductee to the Hot Rod Speed Parts Hall of Fame, no other tachometer on the market has had anything approaching its impact on professional racing. Built for a lifetime of service under the harshest conditions, this is the no compromise tach for no compromise builds. When you’re ready for the best, there isn’t another choice.
Feature Points
  • Traditional incandescent lighting illuminates around the perimeter of the dial
  • 12 and 16 volt compatible, well-suited with nearly every street car or race car electrical system
  • Gauge kit includes bulb and socket assembly, red and green bulb covers, mounting hardware, and detailed instructions for installation
  • AutoMeter’s race proven air-core electric tachometers provide quick and accurate readings with a needle so responsive it can go from 0 - full scale in 333 milliseconds
  • Compatible with 8 cylinder engines only (4 pulses per revolution)
Ships With
  • Bracket Included
California Residents: Prop 65 WARNING prop65 Cancer, Birth Defects and Reproductive Harm


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Adaptable to 1963 Studebaker Hawk with electronic ignition..Will be a replacement for old in dash unit

Asked by: Gerrystudebakerpompano
Thank you for your question. This tach would work with your engine for reading RPM. However, our gauges aren't designed to fit in any specific factory dash panel. They are generally built to be installed into aftermarket dash panels or mounts.
Answered by: Alex at AutoMeter
Date published: 2024-02-20

My "Cobra" speedo operates okay, but reads about +10 on average, Gearbox is a Tremec 5 speed. Is there a calibration method avail, OR does one have to obtain a different gearbox-to-instrument interface ? (I'm not the original installer)

Asked by: AH3K
If you could send us an email at [email protected] and consult with a Tech Agent with more information.
Answered by: Sarah from AutoMeter
Date published: 2021-11-22

What size is the hole have to be in the Dash Board and will it work on a 4 cylinder engine like an MGB ?

Asked by: Raz94
The Cobra tachometer is one of the only tachometers we offer that is compatible with 8 cylinder only. Everything else that is compatible with 4 cylinder is available in options to fit the following hole sizes: 3-1/8”, 3-3/8”, and 4-5/8”
Answered by: Sarah from AutoMeter
Date published: 2021-09-30

Where can I get a new bulb for my 4in AC Cobra tach? Part number? 

Asked by: Lalmeida617
Thank you for contacting us. You will need part #3212.
Answered by: Sarah from AutoMeter
Date published: 2021-08-23

I would like to install this tachometer in the original dashboard of 67 in place of the oil pressure and alternator.I am interested in buying a tachometer that fits externally and with dimensions to the instrument cluster.

Asked by: FastangV8
Thank you for your question. For further assistance on this, please give our tech line a call at 866-248-6356.
Answered by: Natalia from AutoMeter
Date published: 2021-01-12

do you sell a full set as a package i have a FF5 already built but im interested in upgradeing the dash gauges i need a set of 6 total gauges tach, speedodmeter, alt, water, oil, and fuel? and if so does it include any senors that may be needed??? mark

Asked by: Mark E
Mark, Thank you for your question. Unfortunately we do not offer these in a gauge kit as they would need to be purchased separately.
Answered by: Steve from AutoMeter
Date published: 2019-10-22

Will this tach work with the ignition system from a 2018 Mustang GT? (Gen 3 Coyote).

Asked by: AZ Cobras
Hello, Thank you for your question. Yes, this will work with that system as long as you use our P/N: 9117.
Answered by: Steve from AutoMeter
Date published: 2019-10-08

Do you have a schematic showing dimensions in detail

Asked by: wags1951
Thank you for your question. We do not have a dimension drawing, but it fits in a 4" hole, it has an outside diameter of 4.068", and it has a depth of 2.355".
Answered by: Zach from AutoMeter
Date published: 2019-07-19
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