ATI Super Damper - Elastomer Ring Kits
ATI RB 1000hp 80G balancer elastomer rebuild kits available.
Ati balancers are made to work hard on RB engines, so much so that our leading time attack cars flog out a set of o-rings in one weekend of racing.
On the street they can last years, but they need to be checked frequently!
They are easy to rebuild, and you tube is your friend there.