Not exactly this week, but I wrapped my downpipe. I can't tell whether it resulted in any immediate power improvement since we do not have such enthusiast remappers here that would do a good priced dyno run in between mods (would genuinely be interested to see, although don't expect measurable performance improvement from this).
HOWEVER, what is noticeable is the middle tunnel not feeling like it's on fire after spirited drive, with OE pipe I could feel the heat on my left leg, the 3" is even closer to the walls but the wrap really makes a difference. For now only the curved portion is wrapped, but I will do the rest as well.
If I was to do this again I would bolt it to the bench and criss-cross overlay the wrap.
I cannot but recommend. Just make sure to steel cable tie and tuck any lose ends.
Can't recommend a particular make of wrap, they're literally all made in land of copy plenty (or at least those sold by the usual suspects).
Wear gloves and eye protection, maybe even a mask, and long sleeve, the fiberglass gets everywhere.
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During the weekend I will install turbo blanket as well, test fit:
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As said, right now with the current setup I don't expect significant performance improvement, rather keeping the heat where it's suppose to be.
Turbo blanket study (they used 6L engine in that):
https://repositories.lib.utexas.edu/handle/2152/43718