To improve your 0-60 its very simple, ditch the dual mass fly, and put a lightweight item in there with a decent clutch, my ST170 with a few mods and lightweight fly will do 0-60 in 6.7 seconds all day long. But if you want BIG power then its Supercharging or Turbo and quite a few thousands. There are no quick cheap power mods for the 170 as i have found out, i have spent over a fair whack on mine and its only around 190bhp, will be building a turbo engine for it next.