AUTO METER Tachometer Shock-Mount Adapter Strap — 5" to 3 3/8" Pedestal Conversion, Vibration-Isolating Kit

AUTO METER 3209 is a lightweight shock-mounting strap that converts and secures 5-inch and several 3¾-inch tachometer housings to pedestal mounts for race use.

This mounting adapter is engineered to replace a 5-inch pedestal mount tachometer strap and provide a secure seat for tachometer cases that step down to a 3 3/8" diameter where the strap clamps. Supplied as a complete base assembly kit, the 3209 offers a simple way to convert many 3 3/4" and 5" tachometers into a pedestal-mounted instrument while adding shock-isolating support. Designed for track and competition applications, it pairs with quality instruments to preserve accurate readings and protect delicate gauge internals from vibration.

How does this adapter improve tachometer mounting on a roll cage or dash?

The adapter creates a rigid yet vibration-dampened connection between the tachometer case and a pedestal mount, reducing movement that can affect needle stability. Its strap design matches the standard step-down case diameter so the gauge sits flush and aligned.

• Clamps to 3 3/8" diameter case section for secure fit
• Shock-isolating strap reduces vibration transfer to the gauge
• Keeps tachometer face properly aligned in pedestal installations
• Includes base assembly kit for straightforward installation

Which tachometers will this mounting strap work with?

The 3209 is a direct replacement for most 5" pedestal mount tachometers that have a stepped case with a 3 3/8" mounting section. It also adapts many 3 3/4" and full 5" tachometers into pedestal setups, expanding compatibility across instrument sizes.

• Direct fit for 5" pedestal mounts with a 3 3/8" step-down section
• Convertible for many 3 3/4" and 5" tachometers
• Works with standard-diameter race gauge cases used by major brands
• Requires matching case diameter—measure before purchasing

What comes in the kit and how hard is it to install?

The package contains the strap-style mounting bracket and a base assembly kit so you get the parts needed for a clean pedestal conversion. Installation is straightforward for someone comfortable with basic gauge hardware: remove the old mount, seat the tachometer in the strap, and secure the assembly to the pedestal base.

• Complete base assembly kit included for immediate installation
• Simple clamp-and-bolt attachment—common hand tools required
• No special wiring changes; mechanical mounting only
• Installation time typically under an hour for experienced hands

Is this adapter suitable for street vehicles or daily driving?

No—the 3209 is intended for racing and competition environments. It is built for compatibility and vibration control in track conditions, not for compliance with street-legal mounting regulations or comfort-focused installations.

• RACE ONLY product; not for street applications
• Meant to optimize gauge performance under track stressors
• Not a safety retrofit or DOT-required mounting device
• Pair with race-grade instruments for best results

Who is this for: The AUTO METER 3209 Tachometer Shock Mounting Adapter is aimed at racers, fabricators, and performance enthusiasts who need a reliable pedestal conversion for competition tachometers. If you run aftermarket tachometers in a race car and need a precise, vibration-aware mounting solution—especially for gauges with a 3 3/8" stepped case—this strap and base kit provides a practical, time-saving upgrade. Measure your gauge case diameter and use this adapter with quality instruments to get consistent performance on track.