The Cobra R wing is a fixed design from what I understand. Obviously that thing is designed for the aerodynamics of an SN95, not the Fox. If you strap it onto your trunk lid and it ends up being all wrong for your car, you just threw a bunch of money away.

 

The Fox will only Benefit from a wing that is taller than the roofline(as I read in Grassroots) this is the reason for the wings on AIX Foxbody cars. the SN-95's can be a little Shorter and yes the Cobra R wing Runs about 600 from FORD (I have PN's if you want.) and it creates about 600lbs@100mph and is Fixed.(I have driven a Real Cobra R before and its awesome BTW) Adjustable wings are almost useless unless you own the Telemetry equipment for Downforce (ride height sensors and wheelspeed indicators) or access to a Windtunnel.because there are too many variables it is very hard to adjust it correctly,I have seen people use talc powder on their car to show where the dead spots are on their cars and then use deflectors to Move the air over those areas that would supply downforce.(wings,horizontal surfaces)