that kit actuall does drop oil temps most effectively compared to typical drive shower's. and along with a good synthetic gear oil like mobil 1's there would be a significant term life expectancy.

Doesn't the Bmax have water cooling passages ?

Yes.

Yes, the whole case is encapsulated like a manifold almost and exits thru the top cap.

I didn't know it exited throught the top cap! Does the drive not supply to the engine?? Or does it do both?

Both...

There is the regular pickup that supplies the engine, then there is another pickup just above the bullet which supplies the water to the drive. The water exits via two holes in the upper cap.

Dont Do It...aside The Gimbal Has A Tough Time Holding Up On A Cat To Begin With W/o The Extra Weight Of A Bmax.. The Drives Just Dont Hold Up And The Service Is A Joke !!!!!.we Pulled 5 Nor-techs From 1 Poker Run With 11 Broken B-maxs..... Last Year We Had A Customer Without Going Into Details Had Terrible Luck With The Drives And Servce.... Just My Input . You Asked For It .. Good Luck Either Way.. Oh Yeah The 36 Diesel Spectre We Have Went Through A Dozen Of Them Till Finally The Lower Unit Flat Fell Off.. They Complained About To Much Torque.. We Fixed The Boat By Putting Stock Xr Drives On It And Never I Mean Never Had A Issue AGAIN...

not good news. You pulled 5 boats w/ 11 broken drives? was one a triple?
With hard core comments like that some details would be nice.
And you went through 12 drives w/ one boat alone?
What kind of power were you running ?
Did you have any gimble failures? And what gimbles were you using?
And what kind of pwr were the NorTechs running?
Is it true that the bmax is rated for 900 and the XR is around 550?