I just wanted to give these guys a quick plug, as I popped down recently for a (voluntary) noise test after installing my new muffler. Tidd Bros. Exhausts (03) 9391 4277 90 Hudson Rd, Spotswood. http://www.sportsexhaust.com.au Anyone in the west who gets an EPA letter and needs a compliance certificate should give Fred Sharp a call, he's a top bloke who did me a solid and stuck the noise meter on my bike for free in return for a plug here in the forum. I now know whether or not I'll need to return to stock if a nasty letter does come (In this case it was just a test, no compliance certificate required). If you do go down there for his service, make sure you mention Netrider - If enough people drop the site name he might even consider a future partner offer/discount for all members.