Yes Sir this is the ultimate diff. It can hold loads of power.
No unluckily we don't have any circuit tracks in Pakistan, I'll be doing a decent suspension upgrade for the rear, we are working on the diff for now and once its done i'll upgrade the rear suspension 
This will be a daily runner inshALLAH. Building a true track car in Pakistan needs a lot of effort and tons of money, we don't have any after market parts available for such cars in Pakistan, If ones planning to build a true track car he'll be importing loads of stuff
That's true, building a true track car is a huge undertaking. I wish we had circuit tracks here so we could practice our skills.