Nate already answered this... They'll generally take 350 to 400RWHP before they break, keeping it limited to 300 to 350RWHP is the safe limit (as long as it was a very healthy transmission to begin with).
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.
If you're so inclined I'm always more than happy to accept tips via PayPal. 
Tip Jar ---> 
|