Poole Aluminum Shovelhead Cylinders

Special washers for under the base nuts.  S&S head bolt washers are nearly the same size, but they have a bevel which would "dig in" unfavorably to these aluminum bases.  These washers are flat on both sides.  I know what I needed . . . How could finding something as simple as a correct size washer be so difficult? These were custom manufactured.

Wait 'til you see the heads and rockers . . .