Originally Posted by 04 EDGE
the spring bolts are to absorb vibrations in the exhaust system. cracked manifolds are the most common issue.
I was looking at the tip while it was running yesterday and you are right. It does shake a little bit while the truck is idling. I never looked before to see if it did that.
Then I started wondering about how they mounted it. It looked like they just welded the hangers to the frame. I got under there and looked and they used two stock rubber hangers that just happened to be in the right place. Maybe they planned it that way. At least the whole exhaust will be able to move with the engine instead of resisting it.