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Step 8: Custom Touches

The factory air filter doesn't look cool. So I 3d-printed an adapter for the carburetor so I could put a "massive" 3" cone filter on it.

Link to the STL file on Thingiverse:

Any good rat rod has a comically tall shifter. So, I've extended the shift arm by 24 inches with 3/8" rod and added a custom 3D printed mailbox shift knob. It features a paperclip hinge and fully functional door.

I also 3d-printed a switch box to mount on the dash in lieu of using the keyed switch. There wasn't anything wrong with the switch, but it had too many mower safeties that didn't apply to a go kart, and it really didn't match the feng shui of the build.