the H165 is seriously tough hey, were running it with my brohters SRturbo ute and its holding up alright and were thrashing the diff eg spinning through 3rd gear, it is starting to moan though hahaha. im keeping the H165 in my NA sr. also the weak point in the diff is the axles the centres tend to hold up. And the torque of the turbo SR is alot more than you would expect from the A series so you shoudnt have a problem.