The TTV lightweight flyhweel helps the car to respond quicker by reducing the rotational mass of the engine, meaning the engine will rev faster. The original MINI flyhwheel weighs 12.3kg while the TTV flyhwheel weighs only 5.3, as you can see this is significantly lighter benefitting your engine.
If you are removing the standard flywheel and flywheel bolts, you will need the shorter ARP Flywheel bolts / MINI R50 Flywheel Bolts to fit the TTV flywheel