The approach taken for the DWR1000 adjustable fuel pressure regulator is not to reinvent the wheel, but simply to make a better wheel. Title:DeatschWerks DWR1000 AFPR Titanium. The DWR1000 was designed from the ground up with e85 in mind and is constructed with 100% e85 compatible materials such as stainless steel, anodized aluminum, and nitrile.