Help RWC exhaust question ZXR250C

So everything is working to perfection on the bike and I have fitted new tyres, the bike was imported and complianced with a Yoshimura exhaust and was previously registered several years ago. Do I need to have a factory exhaust to get a RWC in Victoria? The exhaust is actually very quiet. While I'm at it if I do need a standard exhaust does anyone have a stock muffler I could borrow for the RWC?

Thanks in advance.

 

As for a Vic RWC with an aftermarket exhaust it will depend a lot on the person that does the RWC.
Many will want to do a noise test (extra cost) if they are unable to easily verify that the exhaust would meet the noise requirements. A standard exhaust will most likely have OEM part numbers stamped on it and there should be a sticker somewhere on the bike (or in details in the owners manual) that define the tested noise level and RPM that the manufacturer used for compliance.