Heat shield hose clamps

[ChicagoRaptor17]

So my horizontal (exhaust?) pipe under truck has been rattling. Discovered hose clamps were rusted so heat shield is banging around.
Curious as to what size clamps anyone used to retighten and if there’s anything else I should think of before fixing.
Does not look like I could do OEM replacement.

 

[Bill Giles]

I have had a rattle coming from benieth my truck. It sounds like a heat shield - thin metal against metal - It started ~5000 miles ago and has progressed to a constant rattle between 20 - 40 mph. I will have dealer look for heat sheild clamp issue as you have.