From what I understand, and I will say now that I might be wrong, you won’t gain much of anything from the throttle body or it will be single digit hp/tq gains. What you will gain is throttle response from it which will feel like hp/tq gains. The tuner and tune (especially if you get a custom or dyno tune) can gain you a bunch of hp/tq especially if you have more mods like cold air intake, exhaust, long tube headers, etc.
I do know that someone on Facebook just designed and started selling a ported throttle body that was supposed to be really nicely made and do better than FAST, Fatman, and Moe’s, but I can’t find where I saved who it was. It cost $350 and was supposed to be a bolt on but I think there’s a throttle relearn that has to be done to it and requires a tuner to do. Wild One on here might know which 1 I’m talking about. It came out just before Christmas and I know I was really considering it based on their testing but I didn’t have the money.