The Prosport headers are a work of art. You might be tempted to just hang them on the wall and stare at them all day! They are fully constructed out of T304 stainless steel, including the flanges! This set INCLUDES the pictured up-pipe which uses our exclusive 3 bolt flange design between the manifold and up-pipe providing a stable connection without air leaks. With a jaw dropping 45mm inner pipe diameter you can be sure your spent exhaust will exit in a hurry. You have to see this header in person to appreciate it, the welds are just incredible! MSRP: $599.00 YOUR PRICE: $579.99 Thanks for looking! :ddirty: