Ok, so I've searched around, and it looks like it's normal for exhaust wrap to smoke for a while after install. My bad, I should have done my research before.

Anyway, I just put a Helix DP in yesterday, wrapped it with that DEI stuff before it went in, and drove it for 10 mins, smoke billows out of the scoop at every stoplight, it's sort of embarrassing :-x

Anyone have experience with this? How long should it last?

 

~100-200 miles at the most. Did you paint yours with the sealant spray paint? You should if you haven't yet, it is an important step to keeping moisture from building up in the wrap (which is what will eventually ruin your wrap)

Mine smoked for ~50 miles or so.

 

I didn't spray it, maybe I'll stop by Autozone tomorrow and get some...

 

I ceramic coated mine, then wrapped it with DEI heat wrap, then sealed it with silicone. Check out the pics.