Ryan: Had to do a little digging, (Chevy High Permormance Mag.) They rated HPC (High Permormance Coatings) block hugger headers as very good header. They are very short but where room is a premium they work exceptionally well.
Also a indication which I like is .400 thickness flange compared to .300 for budget headers. HPC phone 801-262-6807
popcorn The Truth is Out There (Hope I helped)
