You may want to try a bravo 4 blade, my warlock loved a spinelli 4 blade, they don't like props that have bow lift, the 4 blade has tail lift & put the porpus to a min.

I should have my Revolution4 this week to try out. Thanks to BBlades for their loaner program!

what pitch are you testing ? the spinelli that I ran was a worked 24p, I gained top end & rpms [ loved it ] . I only had the 330hp w/ stainless marine exh & alum intake, boat ran 70 gps. let me know how the Rev 4 orks out.

I'm trying a 23p Rev4 first. We discussed a labbed Bravo1 24p as an alternative. I have the 454 mag so there are a few extra ponies. I am getting 5200 rpm with the 23p Mirage.

Which exhaust worked for you?

I will report back with my testing results when the prop gets here.

the only exhaust I tried was STAINLESS MARINE, nice fit w/ brackets for shift cable & ign module.