Os Giken Superlock Or Nismo Gt Pro?

[R32 TT]

Am looking into getting a 1.5way for the rear of the GT-R.. went to a tight track day here on the weekend and definitely single wheeling..

A couple of mates running Nismo GT Pro diffs, and they are a BIG improvement to their cars.. the only downside to them, is that they are quite aggressive on the street or in the car park.. rear wheels jump and skip like a full locker.. they are set to the minimum pre-load too..

I appeciate you can't always have it both ways, and I am prepared to take the shudders and jutters in order to get the performance, but I wondered if anyone had used either the OS Giken Superlock, or even the Nismo GT Pro "TT" model, which has a less aggressive ramp..

Kind of hoping that one of these still performs hard on the track, but is maybe a little more civil on the street..

Any experiences?