There is tons of stuff you can do for your car. Mechanically all I have installed is a Neuspeed short shift kit. I do have a GIAC chip, but I am waiting till I find a spare ECU so I can avoid voiding my warranty. For suspension, I have the Eibach pro kit and dampers sitting in my living room. I sold my old rims and tires for original Audi Forged alloy RS4 wheels and Kumho Ecsta Supra tires. The wheels are very light weight and $$$ (the reason I bought cheap tires). I am waiting till it gets warmer to install the suspension components. For this summer I want to convert to the TT DP, TT DV, and TT exhaust. If only money fell from the sky. No powerhouse here, just all fun with my daily driver.