yeah, but how much faster are you talking?

I ran wrap on my last header for 3 years without any problem. the only reason I replaced my header was because I wanted a tri-y to match the low to midrange torque cam I had installed instead of the 4:1 header I had in there.

once the old one was out, I pulled the header wrap to check the condition of the pipes after the three years... minor surface rust and some flakes in the areas which were holding water. other than that it was solid, top to bottom. and that's true, first hand experience from someone who's used it.