Precision laser cut from 3/8" thick mild steel, our header flanges are manufactured in the U.S. and are machine surfaced. These header flanges are specifically made for the Subaru EJ257 DOHC 16v boxer-4 engine found in 2004-present Impreza WRX STi's.
Port Size: 1.631"
We carry over 250 different header flange designs, so if you don't see the flange you're looking for, talk with one of our tech reps about custom header flange cutting.
Flanges Sold Separately
Related Products
