You must have a reliable damper that is capable of properly combating vibrations and twist. Your stock damper, is simply a piece of soft steel that has a rubber ring that has been melted in between another steel ring. The inherent problem with that design is that there is no way to maintain concentricity of the inertia ring during manufacturing. Therefore, the damper has to be machined and balanced after the inertia weight has been bonded to the rubber strip. That means when the outer ring slips you lose your timing marks, damper balance and concentricity! The stock damper works just fine as long as you do not make many changes to the motor, such as HP or RPM. When you start changing those things, you cannot count on your stock damper to do its job. Not to mention if that damper is old and worn out, the outer ring has a good chance of slipping or even separating from the rest of the damper and coming off your engine completely! Through many years of testing and tuning, the O-ring style Elastomer damper has proven to be the best choice for performance applications, especially when high RPM is being applied.
CLICK HERE to learn why we chose ATI over the other guy's dampers.