making silencer for exhaust

is it as easy as putting a tin can in and drilling smaller holes?
should i stuff the exhaust with steel wool instead?
pic of exhaust

should i stuff the exhaust with steel wool instead?
pic of exhaust

Australian Kawasaki Sportsbike Riders Discussion Forum - All Welcome, free and easy to join, just click "register" below - www.ksrc-au.com
http://www.ksrc-au.com/phpBB3/