Exhaust flange bolts

[MustangPoser]

My jeeps exhaust flange bolts keep falling out. I had a banks header installed and my cat back replaced by my friend about an hour away.

A week later the bolts came out. I took it to a local exhaust shop and they fixed it, 2 days later they came out again. Back to same shop, they say they did it wrong the first time and it's done right... then they fall out again.

I went to home depot and picked up a pile of bolts and nuts. I've replaced them twice now myself.

How the heck do I stop these bolts from falling out? I checked the belt/pulleys, motor mounts, etc and everything looks good.

[ELVIS]

bolts from the header? or the catback?

god bless?

[Lone Star Performance]

Loctite?

[5.0Thunder]

Moar Torque

[EW]

Stage 8 locking fasteners?

[silverhatch]

Stage 8 locking fasteners?

This.

They are a pain in the ass but can be worth it.

[mk5.0]

Safety wire ...

[Sleeper]

Just double nut them? see how that works for ya. Or get some good locking nuts.

[Skidonenko]

Loctite?

melts when the exhaust gets hot?

[TexasT]

Lockwashers, starwashers, double nut as suggested above. Some kind of castle nuts.
If you are a dfwm baller the stage8 but that is $$$.

Are you getting decent grade fasteners?

[stephen4785]

I haven't done it on exhaust bolts but Iv drilled a hole through the nut and bolt and hammered a roll pin through it to keep nuts from backing out of high vibration areas.