guys i neeed ur help on d exhaust conversion....how i can i low down d noise s i currently using 2 tabung in d center....i feel d noise really irritating coz even i install a sub woofer d sound still obvious.......acy how d police or d jpj checked d noise level..???....cant xceed which or what level......??? thankz need some sifu advice but don s me 2 take it out n install d standard stock haha... :lol: