bro start of with minor2 things such s, open pod,high performance cable and plug.and if u plan to change to l2s later on,u can still use this part...so no money wastage here.and about the vibration,do check ur alignment or ur tyre pressure...i do think kancil is a good platform if ur are new into modfying cars...i personally drive a kancil.no other malaysian car can overtake me..ehehe even sastria gti's can only smell my exhaust fume...hahaha...it doesnt matter what car u drive,its the passion that counts...