Is it safe to heatwrap an HPC coated manifold (Full-race)?
I want to minimize underhood temps.

 

I honestly would never heat wrap anything that is going to be daily driven. The HPC coating itself should be more than enough. Now, if this is a weekend/track car only then I'd say go for it. The problem with doing this on a daily driver is cracking has been caused due to excessive heat on the manifold itself.