hi gents, looking to do my first round of mods very soon to get close to 290-300rwkw... I want to keep my exhaust system as stock as possible... I dont want any drone and dont mind at all if it is quiet like stock.. will a 4" dump + 5" CAT make the exhaust note much louder than factory? if I can get away with not upgrading the dump to make 300rwkw I will. ofcourse all other mods will be in place to get the 290-300rwkw. cooler (maybe), fuel pump, injectors and flash tune. any input and advise is appreciated thanks