Originally Posted by Josh@STILLEN

It's not that they won't fit, it's just not a bolt-on application, and requires some additional modifications, but can be done, several members here have.

It requires removal/modification of an air diffuser / guide plate to the radiator. Presumably this is there for high speed cooling with the longer nose of the Nismo.

We have never tested a Nismo with the plate removed, and can't guarantee there won't be issues with overheating at high speed / track use.

It's more of a precautionary thing on our part. We're not aware of anyone having issues, but until we're able to test it, we don't claim that application for the Gen 3's.