ARP header bolts Part #?

[Derek@Lethal]

My car is a 1.25 but you're saying the current is a 1.5? They must have went back to the 1.25 for 15 or I have an oddball set of heads.

That's weird, I guess it looks like they may have moved back to the coarse thread with the 15's. However, I contacted ARH to be sure about something else and they also still send out the fine thread with the 15 stuff as the cars they tested on were fine.

I would just double check what your car is equipped with before ordering anything with these coyote's.

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[DarkSubRosa]

That's weird, I guess it looks like they may have moved back to the coarse thread with the 15's. However, I contacted ARH to be sure about something else and they also still send out the fine thread with the 15 stuff as the cars they tested on were fine.

I would just double check what your car is equipped with before ordering anything with these coyote's.

Yeah I had been told the 1.5's and the SW headers came with 1.25 which I didn't even look at the thread size until I started pulling my studs out and was like wait a minute, these threads aren't matching up with the 1.5 ARP's I bought. So I whipped out my thread pitch gauge and sure enough, the OEM thread pitch was 1.25 on my studs going into the head. I'm glad I'm not the only one thrown off by it then.

 

[17gt_charlotte]

Before I buy some ARP header bolts, can anyone confirm that a thread pitch of 1.5 is what I would need for a 2017?

 

[Bahndvr]

ARP 773-1002 is the one you want

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