Don't remember on mine, i just went to "House of Hose" a local shop and grabbed the plug and adapter for whatever to 1/8 npt for my oil temp sensor.

 

correction, they are not -8an, -8an does not fit

I guess will order -6an, now

 

6an straight thread sounds about right since greddy used a banjo bolt type system into the pan. I never tested the size because I instantly knew it was smaller than I needed just by looking at it.

 

getting mixed signals here on this particular thread and from what I've found on the greddy site.
Purchased the Greddy oil pan and looking to install oil temp gauge. Ill use one of the ports to run the temp sensor and from some of you guys i'm hearing 6an plug size. However, from greddy its M14xP1.5.

heres the link for reference: http://www.greddy.com/products/engin...model:VQ35+DE/

I know this is an old thread but Terra you are still around. M14xP1.5

I ports for 2x turbo oil draindfdfdfM14xP1.5 ports for 2x turbo oil drain

 

FWIW, I'm almost positive the port should be M14, I have the Central 20 pan and it's M14. I bought a little bushing so that let's me use a 1/8 NPT sensor for oil temp.

 

Thanks Dark, I ended up buying M14 to 1/8 NPT. Ordered the wrong Male/female end so now going on round 2 of buying.....will update final install