I've pulled the trigger on the 107 to 119 Stage 3 kit for my 2020 street bob. Probably without all the research done, but that's classic me, see it, like it, buy
Upgrades | PFAFF HARLEY-DAVIDSON®
MAX Performance Stage Upgrades
Screamin' Eagle Twin Cam Stage III Kit- 103CI to 110CI | Harley-Davidson USA