Is there any markings on a s-tune y pipe to designate it as an s-tune?I bought my car and it already had an s-tune on it.Since doing hfc's I also put a motordyne xyz resonated y pipe on.I would like to sell it but don't know if its a s-tune or a $49.00 ebay pipe.The construction is really good,so I'm not sure.All the pictures I have googled don't really show up well enough to tell.Thanks,Steve.

 

Authentic S tune y pipe looks a little more bronze than its replica counterpart...?? I'm not sure... Maybe someone can confirm