7.4 mpi stainless marine exhaust manifolds and raisers sound

[StefanFL]

Does anyone know if these are much louder then stock manifold/risers?

I have them on 270dancer single 7.4 and it's really loud above 3000rpm, it does sounds healthy and I would love the sound on go fast, but it sounds a bit too much for a cruiser.

I'm trying to figure out if loudness is coming from them, or I might need better sound insulation on hatch