Recently replaced exhaust system to another genuine BMW 318is exhaust. No engine mods at all, on 318is its a waste of time and money in my humble opinion of course. I was going to buy a remus exhaust but decided not to, too me it wasnt going to make a difference in performance. Intake will make the car sound fun, but again a waste of money, I like to spend my hard earned on making the car look nice, eg bodykit, leather interior, wood consoles and so forth. When the time is right I will buy an genuine M3. Regards Freddy