Sunny's wasn't straight cut though was it, Gary? Thought his was a CTS Stage 2+? And yes, I think he break that a few times, as did Paul Jonhson.
I've heard of the BC straight cut boxes running 300BHP and Torque without any problems. The problem with the BC is the design of the gearbox casing itself, being inherently weak and twisting, destroying the bearings.
im told he tryed the straight cut gears and broke them .
loads of pepole run that kind of power through bc/ib5's its all down to how you use it! what you use it for! and how manny miles you do.