I know there is a lot of questions asked about 'why is my car smoking' etc however.. About a week a go i had my Japspeed exhaust fitted and when i go out for a spirited drive and then let it idle afterwards i get A LOT of smoke coming out the exhaust. This never happened when my old exhaust was fitted, i'm boosting the same as i always have and the car feels no different to drive. Water levels, oil levels are fine. A mate of mine (Joshua.J on here) had excessive smoke come from his Japspeed exhaust when it was fitted (only smoked on idle after being driven). Both of these exhausts that we bought were brand spankers, mine is fully wrapped but Joshua's wasn't. Just before Josh sold his Glanza the smoking had stopped all together so has this ever happened to anyone else after fitting a brand new exhaust?