The Pro/Street dampers are not intended for racing, although the fact that they are cast of nodular iron, as opposed to ordinary gray iron, means that they are suitable for higher rpms than most competitive models.  (Note: The Pro/Street nodular iron harmonic dampers are NOT SFI certified.)  However, to prove the integrity of the Pro/Street dampers, Pro Race Products had the DFI test lab run some spin tests.  The Pro/Street damper was subjected to 8,000 rpm for one hour, and then 12,500 rpm for 15 minutes with no sign of degradation.

Externally balanced 7.30 diameter, and 8.50 lbs

Key Features:

• Nodular iron construction; most cast dampers are manufactured from gray iron castings. Nodular iron is over 30% stronger than gray iron.
• Bonded elastomer – outer ring and inner hub are bonded (vulcanized) to the elastomer. This minimizes the potential for the outer ring to move on the hub, losing true TDC position
• Removable counter weights – external balanced models feature bolt-in counterweights, making it easy to switch from externally balanced engine to an internally balanced engine.
• Precision Balanced – dampers are machined and precision balanced.
• 60-degrees of permanent easy to read timing marks.