1990 240SX Header bolt and stud size?

[GreySX]

Hi everyone,

One of my header studs (the bottom) seems to have broken off in the head. I honestly dont want to take the head off to get it extracted so I am thinking that I can use Stage 8 locking header bolts and stud to ensure that it wont come loose. Now my question is what size are the bolts and studs? 8mm x ?

Thanks in advance!!!

[ob1]

Hey i had this same question and didn't find out until i went to the hardware store. I have a 95 240 and the header size studs are 10mm 1.25.