I bought a header that the flange at the bottom (where it meets the exhaust) isn't threaded. I have read 42 different threads tonight on headers and have no real answers. I can go by a bolt from Scion that fits the original and just compare it but it will be a few days so if anybody can help me in the meantime that would be great?

From the flat of the bolt head to where the threads start-how long is that smooth part? (This is really importand because the shoulders have to bottom out on the flange to allow exhaust flex so the header flanges/etc don't crack)

What diameter are the original bolts?

What is the total length of the stock bolts?
Thanks

 

So-no one knows anything about this?

 

I doubt anyone has these specs without going out and removing their own.. sorry

 

You could always pull one of yours, and take it with you to compare... sure, you'll have a small exhaust leak for a bit, but that seems like your best bet, no?

 

I ended up orgering a spare one from Scion so i will post the specs monday after I get it.

 

Here are the measurements



and the box for the chrysler header bolts that can be used if your flange is not tapped