The ATI crankshaft damper is a 5.67-inch aluminum balancer with a six-groove design and 25 percent underdrive option, configured for LS1/LS2 front- and valve-body layouts without A/C in one-piece form. Its compact diameter and groove count supply the accessory pulley spacing needed for direct replacement on the listed early LS platforms.
ATI Damper - 5.67in - Alum - 6 Grv - 25 Percent UD - LS1/LS2 - F & V Body - No A/C - 1Pc