Hi mods, please delete this post if it's against the rules to list this here . My friend just uogrades his MP4 with "competition pack "for track . Car has a new water pump and radiator . The car doesn't overheat when driving normally and on the highways . But when he drives in hard In sepang , temp starts to boil . Any advice ? The radator is faulty ? Water pump ? Or .. It was with the dealer for 2 weeks . Best
