Something to consider for the future, the K&N Filter KN171B has a socket drive on the bottom and makes this a much easier operation than the original S&S 31-4103 filter. You can also wire lock them on for extra security if you fancy. It filters pretty much the same and costs less as well. Chain wrenches won't fit with the M3W as the clearance is small around the filter, some strap wrenches work though. These filters don't need screwing up like your life depends on it, just a nip.
