When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Headers - If I remember right the flanges that meet the head are austenitic (300 series), so is the tubing, however the flanges that meet the crossover are martensitic (400 series)
Headers - If I remember right the flanges that meet the head are austenitic (300 series), so is the tubing, however the flanges that meet the crossover are martensitic (400 series)