2016 ultra limited 103 in.³ H.O.
i’ve done stage 1 and was very happy with the results. Now I wanna do stage 2 with the .585 lift cams…. I know that I need to upgrade the valve springs and clutches to handle the torque, but is there any other head work that I can do? Polishing, porting?……

 

Screaming eagle 585's? Do have a warranty to try and keep intact or is there no warranty? No warranty then skip the Screaming eagle stuff...some of their stuff is ok but there are better cams available. No warranty and if you're not going to be doing the work yourself then find a reputable indy shop to do a 107 big bore kit with appropriate headwork to match the cam selected. Fuelmoto has a great 107 package that really works well. There's a few great sponsors here that are always willing to help...you can call Scott at hillside for some great advice and quality services