AutoMeter 3991 Sport-Comp Air-Core In-Dash Tach,8k RPM,3-3/8 Inch
AutoMeter 3991 Sport-Comp Air-Core In-Dash Tach,8k RPM,3-3/8 Inch
AutoMeter

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#1823991

AutoMeter 3991 Sport-Comp Air-Core In-Dash Tach,8k RPM,3-3/8 Inch

  • Traditional incandescent lighting illuminates around the perimeter of the dial
  • Compatible with most 4, 6, and 8 cylinder engines (2 - 4 pulse per revolution ignition signals) with points, electronic, and most 12V high-performance racing ignitions.
  • 12 and 16 volt compatible, well-suited with nearly every street car or race car electrical system
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$184.99

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Product Summary

Universal Fit, 3-3/8" Gauge Diameter, Black, White

  • Traditional incandescent lighting illuminates around the perimeter of the dial
  • Compatible with most 4, 6, and 8 cylinder engines (2 - 4 pulse per revolution ignition signals) with points, electronic, and most 12V high-performance racing ignitions.
  • 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
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Key Specs

MFG. Part #3991
BrandAutoMeter
Gauge Diameter3-3/8"
RPM Range0-8,000 RPM
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AutoMeter 3991 Details

Since 1957, Auto Meter has set the standard in performance, accuracy and durability with their legendary Tachometers. The absolute pinnacle of engineering and technology, it's no wonder Auto Meter 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 - 10,000 rpm in 333 milliseconds. 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.
  • Includes bulb and socket assembly with red and green bulb covers

Ships with the following AutoMeter products:

Bulb & Socket:  3212
Light Covers:  Red 3214 & Green 3215
Mounting Hardware:  Bracket Included

Ships with the following AutoMeter products:

Bulb & Socket:  3212
Light Covers:  Red 3214 & Green 3215
Mounting Hardware:  Bracket Included

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AutoMeter 3991 Specifications

KEY SPECS
MFG. Part #3991
BrandAutoMeter
Gauge Diameter3-3/8"
RPM Range0-8,000 RPM
GENERAL
Gauge Face ColorBlack
Lettering ColorWhite
Needle ColorFluorescent Red
Overall Diameter3.375"
LightedYes
Bezel FinishBrushed Aluminum
Bezel IncludedYes
Bezel StyleSuper Bezel
Light ColorWhite Incandescent
Lighting TypeIncandescent
Includes Light CoversYes
Includes Bulb and SocketYes
Includes Mounting Bracket(s)Yes
Sold in QuantityEach
GTIN Code046074039911

Questions & Answers

1 Question • 3 Answers

"Overall" diameter 3 3/8" . . . . . but what is the case diameter? This question goes for all of the tachs that state an "overall" diameter. I need tach to fit in a 3" hole.

by TG

• 8 years ago

3 answers

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