I have the catless cutout downpipes from needswings and they are fantastic! Open header sound is bit much in my opinion, but its fun to open them up every once in a while! Closed they sound perfect, it sounds pretty stock until about 3500 rpm and then it just gets aggressive sounding! IMO the downpipes with EC tune felt like it gave 50hp... no dyno proof lol but... i say its worth it! Only downfall is that they cause the car to get pretty smelly..