hey i bought a spare set of heads off of a guy about 6 months ago with a dropped exhaust valve. Finally got around to working on it today and realized that it already had springs and retainers installed. I then looked and it had some head work done IE valve job. So I was wondering if this valve along with all the others were stock or if they are aftermarket of some brand. It is a stock size valve but I personally dont recognize it, but im sure some one out there will.

here is a pic of the valve.

 

no guesses ?

 

looks stock to me. That bottom looks like a casting which would definitely not be an expensive aftermarket valve.

mine are nice and machined

 

It.is stock. I went up to Nissan and saw one.