hey wich model polini exhaust is this and does it suit mid-race cylinders (stage 6 raceing will be what its going on) or isit for more highend kits
A few more pictures would be useful. From looking at it and reading the sticker it's a Polini Evolution exhaust which means high end. From the size of the can it looks like a 50cc exhaust as most of the evo exhausts with small cans are for 50cc's. There are lots of versions of the polini evo exhausts however as they are on about number 10 by now. The much older exhausts had a stamped plate on them saying polini evolution so it can't be too old but from what I can see of the end can bracket it's not a current model.
The can looks longer in that picture and the end can bracket looks different and it's got a completely different section on the main part of the exhaust!
This is true but if it is the 50cc version which is my educated guess then it really wont work well with a 70cc kit of any sort!
then she shall go on a ported 50cc cylinder instead but will try on stage 6 raceing and see how it goes