I had a complete system from Arrows on my Yamaha T-Max 530 (also parallel twin, albeit half the size). The pipe was louder, noticeably louder, but the sound was not meatier by any means. Sold it a couple of weeks later.
Of all the exhausts I had in recent years (Arrows on T-Max, Two Brothers on KTM 990, Akrapovic on KTM 990 and BMW F800 GS, Beowolf on Tiger 800 XCx and Leo Vince on Varadero and Transalp 700) Beowolf sounded best.
I would be happy to buy it again, this time for AT, but they do not have one on offer :frown2:
Leo Vince is number two on my list and this is what I will probably buy as soon as it becomes available (slip-on only, carbon version).