Header bolt size

[brad1601]

I've picked up a set of headers that did not come with any header bolts,I thought it would be a 2 minute Google search to find out what size bolts I need for 2017 Coyote Mustang header... I was mistaken.

I've been digging through old threads trying to get to the bottom of if they should be M10 1.25 X 25 bolts, or M10 1.5 X 25 bolts and can't seem to find a solid answer.

Places like stage8 bolts say any coyote from sometime in 2011 onwards should be M10 X 1.5 X 25, and yet there is a thread on here from a guy with 15 model saying his were 1.25, not 1.5 pitch?

Has anyone done headers on a 17+ and can tell me what they found? I just don't want to have the wrong bolts come install day

Cheers,

Brad.

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[Volstang]

Like to know what you learn about the bolts. I’m in the same situation. Seems like many of the headers come with 2 different size bolts because you could have either one.

 

[brad1601]

Like to know what you learn about the bolts. I’m in the same situation. Seems like many of the headers come with 2 different size bolts because you could have either one.

Mate I'll be able to tell you what I find by this weekend, I plan on putting them in on Saturday.

After many hours of trawling the web I feel pretty confident they will be M10 1.25 X 25 but I will post up what I find on my 17 model this weekend.

 

[brad1601]

To confirm for anyone who may find this in the future, My 2017 GT needed M10X 1.25 X 25 bolts.

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