So it is pretty common on the Truck motors to break the front and or rear most exhaust manifold bolt.
I knew it would happen on my truck eventually. Noticed it this past camping trip.
So the rear one on the passenger side and the front one on the drivers side broke. (They use the same clamp). It was nice because they broke off below the manifold. They have to be ground if they are not for this kit to work.
You can see the front drivers side one here.
The bolts are just too small to handle the heat cycles seen even in normal driving. Towing wears them out quick. It is only the outer most ones as they see the most flex
The bracket bolts into the head and use a bolt that you screw down to apply force on the manifold.
Sealed mine up first time because I caught it early. Some people do a few heat cycles and retighten the bolt this will usually seal it.
This is the Doorman clamp, probably one of the best things they make.
The large hole is to the clear the temp sensor on the drivers side.
Installed on the passenger side.
With the bolt that applies pressure.
Tons of LSx guys use them. 50 bucks VS pulling the heads and drilling them out. It is meant to be a permanent fix. We will see.
Some people already have 200,000 miles on them and they work great.
They make them for Dodge gassers and the Tundra too, none for Fords, but the Ford owners wish they did.
Nothing for the diesel. I guess they breaks exhaust manifold bolts also.
Towing is a tough duty cycle.