Speedhut PART/SKU Number: A-304
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No calibration is necessary! Plug-n-Play! SPEEDBOX™ Mechanical Drive Speedometer Box (mechanical drive cable included). The Speedhut SpeedBox is designed to operate a cable-driven mechanical speedometer using an electric speed signal from GPS or modern transmission. The Box can be installed in the dash or under the hood.
Drive Output Thread is 7/8″-18
Drive Output Square is 0.112″
1000 turns per mileDrive your Mechanical Speedometer using any of the following signals:
– GPS (automatically calibrates using the included GPS antenna)
– VSS
– CAN-Bus (j1979 Protocol)Ships with:
– Speedometer Cable (I only stock the GM thread-on on style, but if you need something else let me know and i can get it)
– Wiring Harness
– GPS Antenna
To make this work on a MK3 Supra, you need to modify the GM cable provided with the speedbox unit, and merge it with the toyota cable end. Here is a video of this process