This new polished billet electronic timer for generator style engines was developed to accommodate the S&S Super Stock Ignition system in complete S&S generator Shovelhead style engines. It can also be used with other alternator style electronic ignitions. As ignitions on alternator style Big Twin run counterclockwise, this timer must be used with reverse timer gears for correct rotation direction. Made of billet aluminum and polished to a show finish. Designed to be installed and removed without removing the cylinder head. Fits stock, S&S, and other aftermarket 1936 thru 1969 generator style. Timer, electronic ignition, and reverse timing gears must be ordered separately.