Sip Race exhaust Curly

Really wanting to order the exhaust below but can not seem to find any dyno results anywhere or any reviews anyone know much about it as its the exact style i'm after for my scooter needs to be curly so if anyone knows of another type like this if this ones pants. 

Cheers!

http://www.sip-scootershop.com/en/products/racing+exhaust+sip+performance_21001400