Welcome hope you enjoy the forums.
I bought a top end off a guy that did a HD 103 stg4 on a Night Train. He said it made 112hp and 106Tq. Probably not the cheapest option, but a tested combo.
Mine is a 2009 Softail Custom.
Upgraded the girl to exactly that - SE 103 Stage 4.
I aint did any numbers.
Blacktown HD did the job and I am happy.
Is a very differnt ride now........I'm glad I upgraded.
Put a bit of zing in my bling.