This EFI return style Regulator encompasses features and benefits only found on Aeromotive regulators and in a new smaller and lighter package. Capable of supporting applications up to 1000 HP, the 13129 EFI return style Regulator can handle high-flow EFI fuel pumps and the most aggressive street machines; especially those looking for a cleaner, lighter solution where performance is critical or where space is a premium. Base pressure adjustable from 40-75 PSI Fuel pressure rises on a 1:1 ratio with boost (2) ORB-06 inlet/outlet ports and (1) ORB-06 return port 1/8” NPT gauge port Bright Dip Black Anodized Finish Vacuum boost port CNC-Machined 6061 T6 billet aluminum construction This product is not legal for sale or use on emission-controlled vehicles except when used as a direct replacement part matching OEM specifications.