Definetly not stock. Stock has way too many creases in it. Hell, my PT looks almost identical to a stocker but I've measured out the cone angles and belly lengths and it's not. And yea, your silencer is more than likely an FMF can.. I've seen enough on all the 'built' 80's, 125's and banshee's I've had to work on for customers (and do port work to try and save the garage hack crap that made them 'built'..)