I'm quite interested by this, many years ago (probably 15+) one of my friends owned an ex police Astra, it always seemed particularly lively, then it threw it's cambelt and went in to a local garage when he was on holiday in Devon... When they inspected they found the valves were larger and cams also not standard, basically head work had been done, even though he was oblivious that it was modified when he bought the car!

So stepping aside from hear-say, some of you guys are running ex police T5's, what mods did they routinely have, especially if proven by investigation?

Could be very interesting as if you speak to any of my police friends they usually claim that cars are not modified and just very well maintained. Maybe they are just not moving in the right circles