Its cast and worried about cracking ...Any info on wrapping a cast manifold rather than stainless ???

 

you shouldn't have to worry about cracking as much with a cast manifold, but header wrap isn't going to prevent it from cracking.

If you are worried about cracking then brace it to the block to support the weight of the turbo.

ceramic coating would be more effective than header wrap from a heat control standpoint and a lot nicer to look at.

 

Oh no Im not trying to prevent it from cracking with the wrap. Im trying to achive lower underhood temps. I was worried though that it could crack is all Thanks