Speedhut SPEEDBOX A-299

5 out of 5 stars ( 6 )

Part Number: SDU-A-299

$355.49

$394.99

(Save $39.50)

Speedometer Cable Adapters, Speedbox, GM/Ford/Chrysler, Thread-On, 7/8 in. Male Threads, Each
See More Specifications

Speedhut SPEEDBOX A-299

Speedhut SPEEDBOX A-299

SDU-A-299

5 out of 5 stars ( 6 )

Part Number: SDU-A-299

Estimated Ship Date: Monday 10/19/2026

$355.49

$394.99

(Save $39.50)

Estimated Ship Date: Monday 10/19/2026 Would you rather pick it up?

Overview

Brand:
Manufacturer's Part Number:
A-299
Part Type:
Product Line:
Summit Racing Part Number:
SDU-A-299
UPC:
843386113823
Speedometer Cable Attachment:
Male threads
Speedometer Cable Thread Size:
7/8-18
Quantity:
Sold individually.
Notes:
Cable to gauge not included.

Speedhut SPEEDBOX

Speedhut's SPEEDBOX is the ultimate solution for effortlessly upgrading your cable-driven mechanical speedometer. Supporting GPS and modern transmission signals, it's the simplest and most versatile speedometer conversion for any vehicle. Requiring only 12-volts and ground, this unit offers a hassle-free plug-n-play solution that eliminates the need for tedious calibration or subscription services. With a drive output thread of 7/8 in.-18 and a square of 0.112 inches, the SPEEDBOX offers flexibility, and its calibration range from 170-1,650 turns per mile ensures precision for diverse speedometers. The versatile design of the box can be efficiently installed in the dashboard or under the hood. Default calibrated for US speedometers at 1,000 turns per mile—the box adapts effortlessly to signals from GPS or VSS automatically calibrating with the included GPS antenna. Speedhut SPEEDBOX is available with or without the cable (please specify your needed requirements when placing order).

Quick Product Overview:

* Requires only 12-volts and ground
* Plug-n-Play installation
* Drive Output Thread is 7/8 in.-18
* Drive Output Square is 0.112 in.
* Can be calibrated to 170-1,650 turns/mile
* Default calibrated for US speedometers @ 1,000 turns/mile

Drive your mechanical speedometer using any of the following signals:

-- GPS (automatically calibrates using the included GPS antenna)
-- VSS (Vehicle Speed Sensor)

 Loading...

Questions & Answers

Ask a Question

What type of question would you like to submit?

I have a Customer Service question
(order, shipping, returns, protection plans, etc.). Customer Service Question
- OR -
I would like to ask other customers
a question about this Product. Product Related Question
 Loading...

Reviews Write a Review

Some parts are not legal for use in California or other states with similar laws / regulations

Modal Header

Call To Order

This is a custom order part. You can order this part by Contacting Us.

CA Warning Icon

Cancer and Reproductive Harm -- www.P65Warnings.ca.gov

Email this page