Noticed some abnormal noise going down the highway yesterday, so I stopped and popped the hood, only to find that both my downpipe bolts had gone off and joined the bleedin' choir invisible... 

So, now I need to replace them so I can put my exhaust back on. Does anyone know what size they are so I can go down to Fastenal and get some good brass replacements and proper lock washers? 

Here ya go,  I happen to have pulled mine off today.

 

I think they are metric but I took both for you

 

Length ~ 60 mm

Width ~ 10 MM

Pitch - 1.5 mm

 

In standard

 

Length ~2.3"

Width .38"

thread per in 20

Yes they are metric M10 x 1.5 x 60

Edited June 9, 201510 yr by bjytech

Thanks guys. I'll head down to Fastenal in the morning and grab a set along with some lock washers.