Hey, and let me start by saying its nice to know theres another autoxer in here!
First off, Maximum Motorsports I have found to be the best company, no comparison as far as Mustang Road racing and autox performance. I've tested steeda, kenny brown,
eibach, and Maximum Motorsports is the only company that has pushed my car into 2nd place Autox Southern California Regional championship. I highly reccommend all of their products, however quality comes with problems as well. They are kinda expensive, but not too harsh, as well most of their applications are very hard to install. Many shops turned my down on their full length subframes because oh the complexity. I currently have their
Eibach Racing spring set, C/C, their STB, and their full length frames on my car. I will be soon installing their rear
control arms, rear sway bar,
panhard bar, and torque arm. Those applications, it'll be near impossible to fishtail the car. Those are my reccomendations, here is the order I would do them in order to not seriosuly affect your driving skill ( taking it slower is usually better than jumping the gun into a completely different car (feel):
Strut Tower Brace
C/C
Full length Subframes
H&R or Eibach Racing springs
Full Length subframes
rear sway bar
lower control arms +
panhard bar
torque arm
hope you find this helpful, PM me or IM me if you need any further Autox or road racing info