I have a Redfire 3.1 from Billetflow, that is brand new (never been installed). P.M. me with any questions. You would need to order a hub from Billetflow if you don't already have one.
i have a 3.2 of unknown brank (came on the car when i bought it) but i have ran it at the track a few times and on the street alot with it and never had any slip. also its silver in color.