Exhaust Manifold Bolt

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Sep 20, 2019 | 08:24 PM

MoparFanatic21

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Exhaust Manifold Bolt

Anybody have the size and thread pitch for the exhaust manifold bolts? Have to change my header gaskets (they leak) and don't know the size. Google gives me 3 different sizes

Sep 20, 2019 | 09:00 PM

2bit

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From: Wisconsin

Pretty sure they are coarse thread, either 5/16 or 3/8. Usually 3 sizes smaller than the head.

Sep 20, 2019 | 09:08 PM

MoparFanatic21

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Quote:

Originally Posted by 2bit

Pretty sure they are coarse thread, either 5/16 or 3/8. Usually 3 sizes smaller than the head.

I just need to find the size so I can find header studs

Sep 21, 2019 | 10:52 AM

Jimythefan

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From: Milford NH

They are 5/16 - 18.

I know you didn't ask, but I used Remflex gaskets and stage 8 locking hardware when I installed my shorty headers and they haven't loosened or leaked since installation several years ago.

Last edited by Jimythefan; Sep 21, 2019 at 10:54 AM.