Keep logging in and out 2day, in a daze lol, anyway on some of the new astra Mk5s say the 170BHP SRi, it has an chrome oval exhast, fairly big. Will that go on my MK4 gsi? Only i cant fit a SS exhaust as my insurance will be void. However this is replacing like for like. Only thing that bugs me is will it fit and will it affect my car in anyway as its more powerful? Will it mess up the exhaust flow etc etc.