im not sure, because we put the TB V2 head and the exhaust on that the same time.
it sounds sick as
i ordered the 181cc kit for it the other day just waiting for it now.
and at kurri last weekend there was a bike on the line up which i belive was a dirtmax version of the lxr and it was so freakin loud just as it wouldtop out you could feel your little ear bone vibrating loose and it freakn hurt!!! but hey what can i say it was a shitmax