Are your shocks shot?
What kind of springs do you have?
What kind of racing do you plan on doing?
Drag? Auto X? Track? Weekend warrior?
Do you have subframe connectors?
STB? Strut tower bar.......if that is what you mean then it depends what kind of racing you plan on doing.
Is your car still speed density?
2016 VW GTI 2.0 Turbo
1989 Sonic Blue LX Coupe, 349 ci, TW heads, TFS Track Heat Intake, 75mm Accufab TB, 80mm ProM, 30 lb. inj, TKO, 3.73, 31 spline w/ TruTrac, MAC 1-5/8" LT headers w/ H pipe, Flowmaster, electric fan Moates QH
391 rwhp & 424 rwtq...Mustang Dyno 11.5@122mph