One that the truly sets this car apart from the rest of the team (insert horse puns here), the Maximum Motorsports HD Torque Arm.
If you've ever ridden in a foxbody, you know their suspension geometry lends itself really well to one of two things, 1. Dump Trucks. 2. Drag Racing.
However, converting to a torque arm, quick literally transforms the way you feel the road. If I had to pick one modification to keep, no matter what, it would be the torque arm conversion for this particular build.