Does anyone happen to know the size of the exhaust manifold bolt (exit side)?

I happened to lose on at the last track day (I know, wtf?). A part number would be nice as I would like to get a high grade bolt so it doesn't rust.

Thanks in advance.

 

The manifold is held on to the head by a stud and a nut, there aren't any bolts. There are also 2 different sizes for these. One being a 8x1.25mm and the other being a 10x1.25, I'm not sure on the length though. Just because a bolt is a higher grade doesn't mean it won't rust, just means it's stronger, you'd need a stainless bolt to make sure it doesn't rust.

 

stainless corrodes at that temperature too

 

Titanium would be pretty schweet for this application. Not as pointless as those titanium valve cover bolts that people buy.

Don't forget, when you couple a less noble metal to a more noble metal, it was cause the less noble metal to corrode faster.

 

True, forgot about the heat factor there.

 

Sorry, I didn't mean the head side, I meant the turbo side.

would the same sizes apply?

 

They are 10x1.25 for the manifold to turbo. I'm not sure on the length of those either.

 

Man, really? I bought some 10x1.5mm since they seem to be the most common. Meh ... out $5 I guess. I went with 30mm length, but am not sure how correct that is as it was just a guess.

 

Eh, you might be right on that one.

 

FYI, I did some more serious searching and found this:

Bolt: MN119783 is the official part number and it's 10mm X 35mm

Stud: MN119784

Either way, yea hope it helps.