I don't wanna buy a bigger boat but id like to spice mine up a bit, maybe mill the head different pipe and a different spark arrestor, has anyone had any success with these mods?
I assume you mean the water box. No... not really.
The problem is... you could spend +$1k on aftermarket parts... and only gain 2~3 mph. Anything you can do to a ski, will work on the boats... but because of the weight, it's not as noticeable.
I've been lookin for same stuff that you have and it seems that most gains can be achieved with freshing up your pumps, and with different pitch impeller...