The rusted-out exhaust flange bolts on a 2012 Jeep Wrangler JK typically have a 3/8 inch head and are very skinny. The specific part number for the replacement bolts is Mopar Hex Flange Head Bolt, M8x1.25x55.00 (part #6105055AA) for 12-18 Jeep Wrangler JK models. If the threads are too damaged, consider using a Mopar Hex Flange Nut (part #6104709AA) with the bolt or universal exhaust split flanges to repair the connection.

 

Thank you. Is there a gasket that sits in b/w those two pipes?

 

Has anyone tried stainless steel bolts in these applications? The combination of constant heat cycles water (maybe even salt) will quickly eat any normal bolts in exhausts?

For sure the SS bolts will be more expensive, but might save money especially if you factor in the time used to fight the rusted bolts...

 

I just did these when I was replacing my transmission.

The broken bolts and captive nuts are pressed in and can be pressed out. This is what I did. I used a ball joint tool and removed them.

They were replaced with stainless steel M10x1.5 bolts, washers, lock washers and nuts. They filled the holes nicely.

Was a little bit of a pain, but glad I did it.

Here are the pressed out inserts:

I will try to get a pic of the new bolts in a little while.

These are not the nuts I used, they are what I had on hand at the time. They were switched for stainless steel. Unfortunately I am at work and cant go take a pic, but I found one I had taken when I was under the jeep.