Heat shield tape really does work, race grade stuff I have used for years does help quite a bit, gold is better but not hugely so.
I have the silver/fiber based, aluminum, tape, 1.5" wide or so, I cut it into .75" strips, 8 ft long, to make it easier to wrap around the bends of the pipe.
I learned how to wrap back in the 70's when road racing bicycles.
Even better but more effort, use the 1/8" or so thick fiberglass/aluminum tape, (I have it in sheet form, expensive, great stuff!)