bro... you wanna flaunt the laws you better be prepared to pay the fines lor. Number plate is a buta kena type of saman la.
With the exhaust, if it's not ridiculous looking, not loud and doesn't look like a 4" outlet usually they won't kacau. You wanna go BRAAAHHHHHH PLEPPLEPPLEP BRAAAAAAAH everywhere you go sure will kena la. Or if your tip looks like it's hiding a 50mm caliber muzzle, sure will kena also, but if it makes no noise, can just tell the jokers that it's just a tip bagi cantik saja. hehe.