Magnex
yep that looks like magnex as it has the plate that goes under the standard exhaust mount and attaches to that hanger on the opposite side, my old ph1 came with one, it sounded better than the k-tec stealth that replaced it but on the way home it got massively louder one night on the motorway and I got home to realise the backbox was MISSING! lol no idea where it went.
INFACT is that my backbox? lol
A s**t one