I recently got a 92 waverunner vxr. I have replaced all fuel lines and cleaned the gas tank. I have been looking around for performance products to try and get a little more out of the 650. I also rebuilt the carb. I was wondering if the following were a good investment.

Protec intake grate and ride plate.
Tdr waterbox

I was also looking at a solas impeller.

Any input would be appreciated.

Also, are the 701 and 650 exhausts interchngable, I haven't been able to find a pipe for the 650.