Brand new OE Mopar shift knob for L-body 5 speed manual transmission vehicles.  I cannot give you an exhaustive list of what this knob fits, but it will for sure fit:
 
1985-1986 Omni GLH Turbo and non-turbo models
1984-1987 Shelby Charger Turbo, and non turbo models
 
Note that the thread pitch on this one (bottom side of knob...which is where your shifter screws into this knob) is different than the later model Turbo II cars.   So it will NOT fit (for example, Shelby Z's, and such), however we do have those knobs as well.
 
This particular knob here **will however** perfectly fit all Shelby Chargers and all Dodge Omnis from 84-86 with manual trans.   It is also the correct size/pitch to fit the GLHS cars, however, as you know those cars originally came with a Momo shift knob.  Again, if your knob is gross, this would be a nice improvement for not a lot of money and you can swap your car's cap into this knob if you'd like.