Nissan RB25 Stainless Header Flange

Precision laser cut from 3/8" thick 304 stainless, our header flanges are manufactured in the U.S. and are machine surfaced. These header flanges are specifically made for the Nissan 2.5L Straight-6 found in RB25DE and RB25DET engine model vehicles, including the R32 Skyline from 1989-1994.
Port Size: 1.571"
Preformed flange stubs are 2"-3" long, and have one end perfectly formed to the port shape of the flange using the appropriate tubing size for that port. This can drastically decrease overall build time. If you have questions on sizing or other options, talk with one of our techs for more information.

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