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This video will show you how to install a BAM SHIFTS TallBoy shift knob into a 2007 Subaru STI. The process is relatively simple and can be done in a few minutes with basic tools.
Steps:
Start by removing the old shift knob. This can be done by unscrewing it from the shifter.
Once the old shift knob is removed, clean the threads of the shifter.
Thread the new Reverse lock adapter onto the shifter and tighten it into place.
Next, screw on the Thread Adapter and tighten onto the Reverse Lock Adapter. (You can use a drop of BLUE Lock-tight on the INSIDE threads to secure the adapter)
Next, screw on the BAM SHIFTS Core and tighten.
Install your Graphic Grip and position the graphic to your liking. Install top cap and tighten using the included allen wrench,
Last, drop on the magnetic cap.

Test your new BAM SHIFT by shifting through the gears.