The Super Damper has a larger diameter also high inertia which is ideal for that big HP Barra engine. The ATI Super Damper® is the only damper designed exclusively for high performance engines. The proven elastomer design is actually two dampers in one. Ideal for Drag strip and even everyday driving. Super Damper also aids in reducing harmful harmonics which become a big factor at high revs and big hp engines. 
   This kit comes with everything needed. Machined and hardened hub designed by Dyno-mite Performance to the suit the Barra engine and adapt to the unique Super Damper we spec.
Kit consists of
Billet machined and hardened hub and Super Damper
Idler pulley
Billet water-pump pulley