Hydrotech on a 520?

[cottonmouth]

I have 520vx with a 225hp 3.1 ox66efi has anyone done the Hydro tech on this combo and what kind of increase if any found? Thanks Brad.

[ChrisH]

if nobody here has any experience with that setup give them a call. i bet they have done a few kits on that combo and could let you know some info.

[howieranger]

HI. I installed the heads, reeds & the tooner on my 02 520. It took me about 8 hours start to finish.
I gained 4mph and a lot of mid range. Have fun, the gaskets are a pain to clean up.