Let's face it, you can cut corners to save a little money here or there, but, you never want to go cheep when a ton of labor is involved. Our 1/2" Mild Steel Chrysler Style Turbine Flange provides a straight true surface that won't warp due to the extreme temps of a turbo environment. Don't even waste your money on the 3/8" versions out there. This flange will not leave you searching for exhaust leaks after a few heat cycles. Do the job once and never worry about having to pull your header off again.