Finally putting together the Tantrum I bought last year, What size prop comes with the boat that has stock 454mag. I bought the boat with no power so I am looking for a starting point.

I'm running a 28p. Don't have a good answer for a 454..

Yea it came with a 27 but had big power behind it then

I run a labbed 26P 4 blade Bravo on my 525EFI equipped 28'. I'm thinking you should start with a 24P.

29P 4 blade hydromotive..would like to try a 30P Bblades Bravo labbed

When I had a stock hp500 I ran a 26p bravo four blade

im running 25p 4 blade with 550hp give or take but my mechanic at pier 57 says i need to try a 24p