5.7L 6.4L HEMI VVT ATI Super Damper Harmonic Balancer - 15 Percent Underdriven by MMX and ATI

If you want to free up some N/A horsepower by underdriving your accessories, look no further than our MMX/ATI 15% Underdrive! This dampener features a full 7” inertia weight for maximum crankshaft/valvetrain protection! Requires a light amount of grinding to the oil pan/timing cover ears for clearance. .060 minimum clearance from the backing plate of the dampener to the timing cover/oil pan is recommended.