This EFI 24x™ kit is intended to be used with SBC engines that do not require a cam button. Includes billet aluminum timing cover kit 120-00099 (which includes gaskets and attaching bolts), billet steel 24x crankshaft reluctor, crankshaft position sensor, and 1x cam sync distributor. SBC balancers wider than 1.325" will not clear timing cover and CKP sensor.