Precision laser cut from 3/8" thick Mild Steel, our header flanges are manufactured in the U.S.A. and are machine surface. These header flanges are designed for the Audi RS6 4.2L engine.
Port Size: 1.630"
We carry over 300 different flange designs, if you don't see something you need, or for any questions, give one of our specialists a call at 1-800-290-3920. Custom flange designs and one-off laser cutting on header flanges is also available.
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