Welcome to the site fella, loving the photos, really nice areas you have hope you and your loved one are ok after everything thats been happening over there, must be unbelievable Keep the site up to date with pics of your meets and so on
This is a part of return pipe for Crankcase pressure reducing valve named "NAG" produced by Renault Kyoto and its supplier.
The crankcase of F4R engine is filled with blowby gas through piston seals and becomes high pressure to cause "pumping loss" (we call it).
By reducing pressure in crankcase, you can get much smoother revolution. BMC filter helps NAG's work.
This is a part of return pipe for Crankcase pressure reducing valve named "NAG" produced by Renault Kyoto and its supplier.
The crankcase of F4R engine is filled with blowby gas through piston seals and becomes high pressure to cause "pumping loss" (we call it).
By reducing pressure in crankcase, you can get much smoother revolution. BMC filter helps NAG's work.
With this valve fitted, you can get smoother and faster revolution up from 2000rpm to 5000rpm.
No power or torque increase , but feel very nice to drive.