if the welding isn't up to scratch, then maybe retaining more heat in the pipe might lead to cracking - but i'd say that's a symptom of crap welding?
there's a few posts about this recently - the right mix of HPC coating(s), wrapping hot pipes, reflective insulation on sensitive bits, and good cooling system should do wonders for underbonnet temps.
Sun, 19 October 2003 15:23
