AEM 88-91 Civic/CRX / 92-01 Prelude Adjustable Fuel Pressure Regulator

Fitment

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Description

AEM 25-303BK is a billet-aluminum adjustable fuel-pressure regulator with 1:1 boost reference and an angled return fitting.

Specifications

Adjustment range: 20 psi to fuel-pump capacity

Boost-reference ratio: 1:1

Return outlet thread: 9/16-18

Manufacturer resources

Manufacturer product information

Manufacturer instructions

Key features

• 6061-T6 billet aluminum construction
• One-pound fuel-pressure increase for each pound of boost

Specifications

General

What's in the box

• Fuel-pressure regulator and factory fuel-hose barb fitting

Install & Results

At a glance

• Supporting modifications required:
  • Fuel-pressure gauge for setting pressure
  • AEM fuel rail for the listed H22A1/H23A1 applications
• Set fuel pressure with a gauge and follow the supplied AEM instructions for the return and reference connections. Check the assembled fuel system for leaks.