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Product Summary

Universal Fit, 5" Gauge Diameter, Black, White, Lighted

  • Playback a complete run of engine RPM data at 1:1 or 1:3 speed
  • Compatible with 0.5 - 6 pulse ignition signals (1-12 cylinder engines) with points, electronic, and most 12V high-performance racing ignitions.
  • 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
  • 12 and 16 volt compatible, well-suited with nearly every street car or race car electrical system
  • Optional shift light connector allows for the addition of a variety of options from AutoMeter to improve driver visibility and reaction to desired gear change points.

Rebates Available

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Key Specs

MFG. Part #3966
BrandAutoMeter
Gauge Diameter5"
RPM Range0-9,000 RPM
Pointer ColorRed
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Need To Know

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AutoMeter 3966 Details

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 - 9,000 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. Features seven bar LED segment digital display.

Feature Points
  • Playback a complete run of engine RPM data at 1:1 or 1:3 speed
  • Compatible with 0.5 - 6 pulse ignition signals (1-12 cylinder engines) with points, electronic, and most 12V high-performance racing ignitions.
  • 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
  • 12 and 16 volt compatible, well-suited with nearly every street car or race car electrical system
  • Optional shift light connector allows for the addition of a variety of options from AutoMeter to improve driver visibility and reaction to desired gear change points.
  • Program up to 4 gear-specific shift light points to maximize your vehicle's performance. Built in short-shift protection prevents missed shifts due to early shifts by monitoring RPM drop and intelligently determining when a gear change has occurred.
  • Optional Launch Lite feature utilizes a Shift Lite connected to the tachometer to help the driver properly stage the vehicle and maintain desired RPM prior to launch in classes where launch control electronics are prohibited by utilizing the light to indicate whether you are at, above, or below your desired launch RPM.
  • Remote recording trigger lead may be connected to driver accessible push button, trans-brake, line-lock, clutch switch, or foot brake light switch for maximum versatility and ease of use for the driver.
  • Green LED recording status lamp provides quick visual indication of tachometer mode to the driver to ensure you never miss a recording.
  • Traditional incandescent lighting illuminates the front of the dial
Ships With
  • 3209

Rebates

AutoMeter Tachs Season 2026 Mail-In Rebate

Save up to $150 on select AutoMeter Tachs this tax season with this special mail-in rebate. Offer valid on purchases made between March 15, 2026 through April 30, 2026.

Rebate Form

AutoMeter 3966 Specifications

KEY SPECS
MFG. Part #3966
BrandAutoMeter
Gauge Diameter5"
RPM Range0-9,000 RPM
Pointer ColorRed
GENERAL
Sold in QuantityEach
GTIN Code046074039669
Gauge Face ColorBlack
Lettering ColorWhite
Needle ColorFluorescent Red
Overall Diameter5"
Gauge SweepFull Sweep
Liquid FilledNo
LightedYes
Bezel FinishSilver
Memory StorageNo
Shift Light IncludedNo
Sending Unit IncludedNo
Sending UnitElectrical
Bezel IncludedYes
Bezel StyleSuper Bezel
Light ColorWhite Incandescent
Lighting TypeIncandescent
Gauge Range0-9,000 RPM
Includes Bulb and SocketYes
Includes Mounting Bracket(s)Yes
Gauge StyleAnalog
Gauge Number ColorWhite
ShapeRound
PlaybackYes
Customer Impersonation Script