Renault F1 dyno

I've seen a similar video of the Minardi engine, but in the same amount of time its headers were glowing WHITE hot. Are they using Inconel, or, in broke Minardi fashion, are they cutting corners to save money?

(For those of you who don't know)

http://www.burnsstainless.com/TechArticles/Inconel_article/inconel_article.html

http://www.micronmetals.com/inconel.htm