The ATI harmonic balancer is proven and has been used on numerous factory engines. I've personally seen minor horsepower increases JUST from installing this balancer and on top of everything else, it is both tunable and rebuildable! Is is also a non friction unit and doesn't rely on liquids or clutch type functions to work.

The ATI, in my opinion and the opinions of the engineers of SEVERAL O.E.M. manufacturers, is superior to other aftermarket products.

Never use a minor caliber bullet on a major caliber adversary