Aeromotive EFI Fuel Pressure Regulator Part # 13129. This EFI Bypass 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 Bypass 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 30-70 psi. Fuel pressure rises on a 1:1 ratio with boost. Provides (2) ORB-06 inlet/outlet ports and (1) ORB-06 return port. 1/8 NPT gauge port. Vacuum boost port. CNC-Machined 6061 T6 billet aluminum construction. Stainless steel mounting bracket.