The one thing a X and XR have in common, is that they are both JUNK!

My Bravo 1X lasted three seasons behind my 496 HO but lasted all of 7 hours when I repowered to the 525. The XR upper/Imco lower has held up well for two seasons now. Some people can get the Bravo 1 to live with big power but I guess they don't drive as aggressively as I do and maybe they have a lower "X".

So, yeah, if you add significant power keep some $ handy for a new drive.....

so what would be your choice of drives on the 496ho-600sci's????

Maybe I'll upgrade the drive first

I was wonder the same thing

Imco SCX upper SC lower

THE SHOP I USE TOLD ME TO GO WITH AN SC WHEN I DO MY ENGINE WORK

Im running bravo1s behind my 32 active thunder that has a high x dimention with twin 600 hp 500hps at 90 plus mph at 5600 rpms with minimal problems. Would like to go to xr uppers and imco lowers.

A buddy has X's on his 35 Cafe with 600hp blowers. No problems. He does drive it with caution though..easy out the hole.

A SC uses mercury XR gears which are still a 50-50 deal on
weather they're junk or not.....If you dont want to worry about it go SCX.