Cast aluminum solo seats. These are cast in small batches of 10, and feature a great shape with a nice kick up in the rear to keep you from sliding off of your bike, which is always nice.
11.5" long and 10" wide this is a perfect fit on your chopper or bobber project. The raised cast bosses on the bottom allow you to drill and tap to mount your seat pivot and springs, and the extra width in the spring bosses lets you adjust your spring mounting side to side to fit your frame rail width perfectly!
Also easy to modify, you can check out a how-to article on mounting these seats here
, which also features some speed-drilling and modification.