Motion Raceworks Fuel Regulator Bracket for Side/Rear Mount 4150/4500 Intake Elbow (Aeromotive) 27-00001 - Motion Raceworks 4150 4500 Fuel Pressure Regulator Bracket for Aeromotive EFI Fuel Pressure Regulator. This regulator bracket works on 4150 AND 4500 flanges. This bracket can be used on any of the 4 sides of either style flange due to the slotted holes in the bracket. This means you can mount the regulator on the back or off to the side depending on clearance and preference! - Laser CNC cut and CNC Formed this bracket is a great piece and makes mounting your regulator very easy! This bracket is designed to fit a variety of two-hole Aeromotive brand regulators including the following below. May apply to others as well! - Fits Aeromotive: 13110, 13132, 13133, 13134, 13137, 13138, 13139, 13140