I tried searching on here and cant find a good answer. Downstar sells titanium header bolts and nuts for honda and asked me if i can confirm the size of ours to see if it fits. Thanks guys

 

No clue, I would just go down to Nissan and buy one, they're like $2. Then you can take it home and measure, or if you have a thread pitch gauge just bring it down to Nissan.

Part number 14064-31U0C

 

The stud shold be around M10x1.25x48
I ordered some titanium studs and nuts also from Race Ti
https://www.raceti.com/product/m10-x...8mm-15-8-25mm/

I made a youtube video comparing it to the stock studs: skip to aorund 5:15

You Tube

 

Awesome man thank you so much. Also on the head itself there wasnt a full set of studs right just a few? I looked at mine an was thinkin im missing a few lol

 

They might be broken off in the head. Make sure to use high temp anti-seize on those new fasteners. Permatex makes a good 1800F copper anti-seize, the 1600F aluminum anti-seize will work fine too, my rule of thumb has always been if it's threaded into aluminum use aluminum anti-seize, if it's steel on steel use the copper.

 

I'm not 100% for DE and HR but believe there should be 2 studs per cylinder to hold it down.

 

thats how they were