Hmm, I was mostly concerned with bike fit and felt my top end could use some help anyway so I just chopped it right down lol. I've always been pleased with my bike's lower mid range and to be honest while the shorting the length of the head pipe may focus the tuning towards the top end - there is still effect through the full range with this pipe.
While it didn't make it do wheelies or anythin' - my low end did improve a little too
I'm very happy with it despite it's somewhat odd look. I'm very pleased with the routing options it allowed me and being able to have it end behind
me and not right under my feets o.O
BTW - the primary reason for spring-clamp exhaust is to isolate the exhaust system from engine vibration. Not uncommon to see on other small 2-strokes like snowmobiles, ultralights and others. It's usually a ball and socket joint - but with longer exhausts and high vibration the metal can fatigue and crack over time, particularly if unsupported.