Hybrid Racing fuel pressure regulator features a piston-type design that introduces damping into the regulator to reduce pressure fluctuations and needle bounce, giving you a more stable and reliable fuel pressure. Constructed from aircraft grade 6061-T6 aluminum and 304 stainless steel, each regulator receives durable Teflon impregnated, hard anodized finish and redundant seal quad o-rings for improved performance and longevity. The end-product is a regulator that keeps your fuel pressure consistent and looks good doing it. Each regulator comes supplied with all of the fittings you’ll need to hook up either a return or return less fuel system with -6 AN lines. The regulator can accept up to -8AN lines.