Autometer 3-3/8 Pro-Comp Spee

OVERVIEW

When you are pushing your air-cooled powerhouse to the limit, you need instrumentation that can keep up with the vibration, heat, and intensity of a high-performance environment. The AutoMeter 3-3/8 inch Pro-Comp Mechanical Speedometer (ATM5153) is the gold standard for builders who demand precision and a rugged, competition-ready aesthetic. Featuring a high-contrast black face, bold white numbering, and a signature fluorescent orange pointer, this gauge ensures that your speed is readable at a glance, whether you are screaming down the drag strip or navigating a dusty trail in your trophy-style baja bug. The 160 MPH range is perfect for high-horsepower builds where the stock 80 or 90 MPH VDO units simply fall short, giving you the headroom needed for serious performance applications.

As a specialist in Volkswagen performance, we know that the "Pro-Comp" series is favored for its legendary durability and mechanical accuracy. This unit features a built-in resettable trip odometer, allowing you to track fuel stops or leg distances during off-road rallies with ease. It is housed in a sleek, brushed aluminum bezel that adds a professional, race-inspired look to any custom dashboard or fiberglass buggy pod. It is important to note that while this is a mechanical unit, it utilizes a standard domestic 5/8 inch-18 threaded input. This means it is built to withstand the rigors of high-speed vibration much better than flimsy plastic alternatives, providing a steady needle sweep that professionals trust. If you are tired of bouncy needles and inaccurate readings from aging stock equipment, this AutoMeter Pro-Comp unit is the ultimate upgrade for your cockpit.

FITMENT

This is a universal high-performance gauge that fits various custom and modified Volkswagen applications. Please note that custom dash modification and a specific conversion cable are required for VW installations.

• Volkswagen Beetle (All Years): Requires 3-3/8 inch (85.7mm) dash hole modification.
• Volkswagen Karmann Ghia: Fits custom dashboard layouts and performance panels.
• Volkswagen Type 2 Bus (Split & Bay Window): Ideal for custom overhead or center consoles.
• Volkswagen Thing (Type 181): Perfect for rugged, open-cabin environments.
• Meyers Manx & Dune Buggies: Standard fitment for most aftermarket fiberglass dash shells.
• Sand Rails & Woodys: Designed to mount in any 3-3/8 inch gauge pod or panel.

SPECS

• Product Model: AutoMeter Pro-Comp Series 5153.
• Gauge Diameter: 3-3/8 inches (85.7mm).
• Speed Range: 0 to 160 MPH.
• Drive Type: Mechanical (Cable Driven).
• Input Thread: 5/8 inch - 18 threaded cable input.
• Drive Square: .104 inch square drive.
• Odometer: Integrated 6-digit odometer with resettable trip meter.
• Bezel Finish: Silver / Brushed Aluminum.
• Face Color: Black with White accents.
• Lighting: Incandescent (includes bulb and socket assembly).
• Calibration: 1,000 RPM at 60 MPH.

PRO TIPS

1. Solving the VW Cable Connection Challenge

The most critical thing to remember with the ATM5153 is that it will NOT accept a stock Volkswagen press-on or threaded speedometer cable. Because this gauge uses the American standard 5/8 inch-18 thread, you must use a custom conversion cable. These cables typically feature the VW-style square end for the front wheel spindle on one side and the 5/8 inch threaded nut for the AutoMeter head on the other. Don''t attempt to "make it work" with pliers or tape; using the correct conversion cable ensures your speedometer stays accurate and the internal gears don''t strip out due to improper alignment.

2. Perfecting the Dash Installation

Most stock VW dashboards use an 80mm or 100mm opening for the speedometer. The 3-3/8 inch (85.7mm) size of the Pro-Comp gauge is slightly larger than the standard 80mm hole found in many Beetles and Ghias. When installing this into a metal dash, we recommend using a step-drill bit or a high-quality hole saw to carefully enlarge the opening. Always deburr the edges and apply a touch of touch-up paint to the bare metal to prevent rust before sliding the gauge in. The included mounting bracket will provide a rock-solid grip, ensuring the gauge doesn''t rotate or vibrate loose during high-speed runs.

3. Maintaining Smooth Needle Operation

To prevent the "needle bounce" that often plagues mechanical speedometers, proper cable routing is essential. Avoid tight 90-degree bends in your speedometer cable, as these create friction and cause the inner wire to bind and release, resulting in a jerky needle. Before final installation, we highly recommend lubricating the inner cable with a high-quality graphite-based cable lube. This reduces drag and ensures that your 160 MPH Pro-Comp gauge provides a smooth, linear reading from a dead stop all the way to your top speed. Also, ensure the trip odometer reset knob is accessible through your dash layout so you don''t have to reach behind the panel every time you fill up the tank.