Front and rear limited-slip differentials
These, arguably, are the most serious parts of the kit: the front (steel plate) and rear (carbon plate) limited-slip diffs. Fitting them is a skill in itself.
First off, the engine has to come out. Then the gearbox. But it’s not just a case of bolting the new one in after that. The front diff is a proper pain to fit as the original housing has to be shaven down by hand to accommodate it. Then it’s just trial and error to get the shims set up and the whole thing hooking up nicely.
Once in, they’re optimised for front and rear balance. They’ll make a real difference though as they’re extremely good at transferring all that torque to the ground via the trick four-wheel-drive system.
Compared to the normal Nismo, they’re a lot better out of tight corners. So if you take Nürburgring for example, and you come out of the Carousel, they’re very good at the getting power down and you towards the horizon.