Had my 04 updated this year to doo's roller secondary. Haven't riden it yet. Got it at Absolute Power in St. Albert, good guys. Cost 450 with new Dalton helix. Changes out one half with all new components, bushing and all. If your bushing or helix are getting wore could a cost affective update. Let you know how it works out. Done lots of others upgrades be interesting first ride in a couple weeks.
None, it is all BRP parts. They use one half of orginal sieve and install new roller style. Probably get done in cowtown somewhere or the guys at racers edge