Lots, new gearbox, rear radius arms, new clutch, new exhaust, new starter motor, new disc brakes.
Cheap car but insurance far too high for young drivers. Needs five gears. But easily tuned up to beat Novas. Needs to be thrashed to get anywhere but looks quite good and handles surprisingly well due to fat wheels.
I would say that a Metro would look nice tuned as I have now got one, but I have no ideas on how to tune it. I always read Max Power and have never seen a Metro in there, does anyone have any pics of one of these cars done up?