I have no idea exactly what has been done, they never tell; so all you need to know is that it works.
No serious track work, just one Winton Fun Day last year. Also, ive always tried my best to stay off the limiter; so its hardly been there, definitely only enough times to count on one hand.
Just to confirm this was actually fitted on my new big dollar forged engine last week, then before the sump was assembled on, it was removed at the last minute and replaced with a silly expensive one for added security.
Forgot to mention the pump has a BRAND NEW Nissan Genuine oil seal fitted and will come with a BRAND NEW Nissan Genuine Oil Pump gasket.