Where to buy new exhaust manifold bolts?

[Aftermath]

aust manifold bolts?

Trying to wrap up my Optimizer build. I have 3 sets of exhaust manifold bolts and none are worthy of re-using. I want to replace with new but not sure where the best place to buy them. All help us greatly appreciated. 😎

[Robyn]

Likely that Dorman makes replacements.

I have acquired new ones from Ma General in the past.

These bolts are a TRI lobe self locking thread that is also a rolled thread.

Some have the stud head and there are a few different lengths too.

SS diesel supply has them on their web site.

Good luck

[sctrailrider]

I didn't find them on SS site... got a link??

[Aftermath]

So I found a link with specs. I double checked measurements against my roached set and they seem to be dead on.

Anyone with an opinion of grade 5, 8, oem, or Stainless?

Driver's side
(6)- 10mm x 1.5mm x 64mm
(2)- 10mm x 1.5mm x 45mm

Passenger side
(3)- 10mm x 1.5mm x 64mm
(5)- Bolts with stud standoffs 10mm x 1.5mm x 84mm
The standoffs are 10mm x 1.5mm x 14mm

I plan to call the Dealer but already know they love these bolts

[JohnC]

Grades 5 and 8 are SAE specs and apply to SAE hardware. Metric hardware has a different set of specs. Grade 8.8 corresponds roughly to Grade 5 and grade 10.9 roughly to Grade 8. Choose the grade that matches the OEM parts. Otherwise, your torques and expansion characteristics won't be right.

I'd avoid stainless. The bolts will last a long time, at the expense of the material they're screwed into.

[Robyn]

Just an FYI

Do not use regular bolts of any grade.

The OEM bolts (Or replacements) are a rolled thread that locks the bolts in so they don't shake loose (And they will)

The site I referenced has the proper bolts for the job at hand.

Standard metric bolts can be used, buttttttttttttttt, you will die a thousand deaths dealing with the issues they will give you.

SS diesel supply link

https://www.google.com/url?sa=t&rct=...V7ggGTmQsmgcUv

[Aftermath]

Thanks Robyn!