RE: is this any good?
OK, first off, a little history lesson. The Arrow Shark mono's are splashes of the Delta Force hulls which have proven themselves in NAVIGA competition. I've seen complaints about how poorly the engine rails were mounted so those may have to be reinforced.
The exhaust system is a muffler, not a tuned pipe so there's another thing to do to get some more speed out of them.
I'd rather hear the boat runnning instead of listening to Madonna.
Yeah, I've got kind of a "collection" of things myself.