We have just last week put S&S Easy start cams into 2 of our 2008 bikes;FLSTF and FLSTN.I put the 551 one in and my brother put their 583 into his Fatboy.We too have T/maxes with Autotune and stage 1 Air Filter and exhaust mods.Having the adjustability with the T/max has been a boon with tuning for the new cams.
These are both low to upper middle range RPM cams;with the 551 coming in about 1700 and done by 4200.The 583 starts about 2100 and goes to maybe 5000.These are both bolt in,meaning you can keep the standard valve springs if you wish,and can even reuse the standard pushrods if you take the rocker covers off.These cams come with new Torrington bearings included.As an extra bonus,the compression release function of these cams works really well on startup.Because they're still relatively low lift,they are still quiet in operation and kind to your valve train.
As always, i guess,you have to be VERY HONEST with yourself about how and where(rpm ranges) you mostly ride. We're very happy with the torque they provide.Check out the info and dyno charts under"S&S easy start cams".