How to tell stock GT exhaust

[VibeGT17]

I recently bought a 2003 GT vibe from the dealer used. After seeing some other GT vibe exhaust systems, I have a feeling that mine might not be a stock exhaust system. The tip on mine is bigger then most of the others i've seen on GT's. Did that change through the production years when the HP dropped, or might i be lucky enough to have the previous owner installing itIs there any guaranteed way to tell? Tip size, particular place i should look for a manufacturer stamp/brand?

[WaveAction]

if you can try and get some pics, hard to tell without pics if it's the stock gt exhaust or not

[kevera]

Most aftermarket systems are a shiny stainless steel.Also,manufacturers stamp there name on the mufflers,most times.