Our Performance ECOtec crank pullies (damper) are ready for shipping! These fit ALL ECOtec Engines. These can be used as a normal damper or with our stand-alone crank trigger system. These have been popular with our dirt track guys as well. The benefit of this is reduced harmonics of the rotating assembly. The stock balancer offers little to no protection with this as most we have seen are at mileages where the rubber is gone or partially missing.