OK. NT1 Experts......

You've been asked a thousand times I know................here goes.
Time does not allow a thorough look into this thread's multitude of pages....sorry.

Once getting the NT1 (08) What upgrades help?
I'm interested in parts that will,
1. Lighten the drive train.
2. Replace parts which wear fast.
3. Help in set-up, maintenence or stiffness of the car.

Thanks for your help.

Regards,
British Menace