for references n info.....taken from Micra sites....any ones??? :D

This is a simple mod that you can do to every stock micra.
You will notice a better response and better acceleration.
Parts needed:
Aluminium tape
+- 1M of 60mm flexible paper tube.

1. isolate whit aluminium tape the air filter box ,in and out, this will create colder air box.
2. extend the flexible tube to the front grill , take him out and isolate whit aluminium tape .
3. that’s it!

since aluminium tape...