Originally Posted by 370Zsteve

Really? From a Nismo catalog, not very hard to find:

NISMO is world-renowned as the premier source for extreme Nissan performance. From Japanese GT racers to Dakar Rally trucks, to the wildest
versions of the Skyline GT-R, NISMO gives you an all-access pass to genuine factory-engineered, dyno-tested, racetrack-proven performance.
And as you’d expect from the same engineers who design Sports Prototypes to run at full sprint for 24 grueling hours, NISMO components are built to last.

Support from the factory means that every NISMO component is thoroughly engineered and rigorously tested to ensure a seamless fit and
outstanding performance mile after mile. Whether you’re a Z driver aiming to outrun Porsches around a track or an Altima driver who wants to sharpen its street-ready edge, NISMO stands ready to take your Nissan to the next level.