Just finished build, 95" with SE Heads ported and Zippers 557 cams on my 2002 Fat Boy. After break-in and 500 miles twisted throttle and really had to hang on, torque was unreal from 2200 rpm all the way up to 5800 rpm didn’t take it past 5800 rpm still want to get some more miles on it.
Had S&S 510 cams in before but they didn’t really come on until 3000 rpm. The 557 cams are very smooth with torque down low and all the way up to 5800 rpm. Great cams bike runs like I think it should, I just now need to get a dyno done to see what numbers I’m getting. Will keep you posted as to the dyno result.