Riva quality is always top
Riva quality is always top notch. But if you like to be different,and stand out from the stock skis. They'll def hear the difference. Now I do have the riva water box also. So I can't comment on my set up vs the stock water box. But out of all the group riders I was with. They def all said it sounded awesome,and you can really hear it. I have noticed on multiple tests in different conditions. A 0. 4 increase in mpg. This was done over a span of two weeks. I do have the impeller,air filter,top loader intake,and pump seal kit. Pretty much everything minus the tuner. Word of advice. Use an extend a wrench to get the back hose clamp. Idk what Yamaha was thinking putting it where only a small child can fit. But def recommend