The torque requirement is more than the stock rod bolts (more clamping force). This means that when you install them on the stock rods, the big end (the actual rod material) is compressed ever so slightly more. The internet seems to think this is a problem which requires remachining of the big end bore - YMMV.

Quote Originally Posted by lithium View Post
on the other hand increasing the maximum engine speed increases the max force applied to the rod bolts. increasing max engine speed has no affect on the maximum compressive force on the rod.
Increasing engine speed affects the compressive stress of the rods. The pistons are accelerated both downwards (rod tension) and upwards (rod compression).

Is the increase enough to warrant a forged rod? I don't know. Seems to be plenty of builds out there using stock LS rods with uprated bolts whilst revving sky high.