I bought a Merc Revoultion 4 blade prop and since I installed it, its been grinding that black composite hub to shreds. Is this consired a solid hub as compared to the standard rubber hub, or is there one that is made of metal and that I can put on? CP Performance told me its good for up to 400 hp, but this summer I'm upgrading past that and need something stronger without slip.

you will need the solid metal hub.