picked up a set of bub exaust for a fxr, year unknown. was thinking of reshaping/adding length to flange to make fit my bike. here are a few shots laying against my pipes. what do you all think, possible problems?

also just ordered a badlander seat. and just installed 6" risors and drag bars this week.

 

will there be any performance issuies? does anyone know what bub exhaust these are,i can't find any pics of these any where.