While installing the walbro today, I noticed that there was a small nick on the filter screen. The nick is very small, approx the size of a pencil tip but seems like it could serve as a direct route for debris. Does the dealership sell this part? I've tried searching a few oem nissan sites but the part doesn't come up. Any ideas of where to get it?

 

I think injected performance has them.

 

I wonder if there is any difference between an aftermarket Walbro filter sock and an OEM one? ... should be the same I suppose...

 

It is alittle diff. Not sure if the walbro one will fit. Im sure one of the sponsors would know if you wanted to PM them.

You could try and put alittle heat to the one you have and see if that closes up the hole.