According to the guys that fitted mine for me I didn't need a camber kit and they are a very reputable mechanical workshop. Having said that though, I would recommend having them fitted by someone that knows what they're doing and will do the job properly for you, including accurate checking of alignment to all 4 wheels once fitted. These cars (mine at least) are fitted with a fairly long resonator at the front of the car, according to the guys that fitted my rear sports muffler (which was all I had changed) if you want it louder, shorten the resonator otherwise a sports muffler should be all you will want for a nice note and no droning
