AEM 25-304BK Black Adjustable Fuel Pressure Regulator for 94-97 Honda Accord

Vehicle Fitment

• 1994-1997 Honda Accord (2.2L I4 F22B1/B2)
• 1996-2000 Honda Civic EX (1.6L I4 D16Y8)
• 1996-1997 Honda Del Sol Si (1.6L I4 D16Y8)
• 1997 Acura CL (2.2L I4 F22B1)

Features

• CNC-machined billet 6061-T6 aluminium body for strength and lightweight construction.
• Adjustable fuel pressure range from approx. 20 psi up to pump-max for precise tuning.
• 1:1 boost-reference ratio for forced-induction applications.
• Interchangeable discharge orifices to match different fuel pump outputs.
• Mounts directly to OE Honda/Acura fuel rail or optional high-volume rail.
• Accepts -6 AN or 9/16"-18 fittings; includes barb for factory fuel hose.
• Supports fuel systems up to ~1000 hp.
• Offset flange design with 90° return-line fitting for improved routing.

Specifications

• Body material: 6061-T6 billet aluminium.
• Fuel pressure adjustment: approx. 20 psi - pump maximal output.
• Boost reference ratio: 1:1.
• Fittings: Accepts -6 AN or 9/16"-18; includes barb for return hose.
• Return port: 90° banjo/angle fitting.
• Compatibility: Specified for Honda/Acura models using fuel rails as listed.
• Emissions: Racing use only; not street emissions-certified.

Included Components

• 1x AEM 25-304BK adjustable fuel pressure regulator (black finish)
• 2x Allen-head bolts with washers for mounting
• 1x Barb fitting for factory fuel return hose
• 3x Interchangeable orifice plugs for tuning flow
• 1x Installation instruction sheet / manual

Product Description

The AEM 25-304BK is a premium adjustable fuel pressure regulator designed for performance Honda and Acura applications. It allows precise fuel pressure control for high-flow injectors, turbo/supercharged setups, or optimized fuel trim stability under load. The billet CNC-machined body ensures durability and lightweight construction, while the adjustable range supports engines up to ~1000 hp.

Installation is straightforward on compatible vehicles including the 1994-97 Accord 2.2L, 1996-00 Civic EX 1.6L, 1996-97 Del Sol Si 1.6L, and 1997 CL 2.2L. The regulator mounts directly to the OE fuel rail or optional high-volume rail and includes orifice options for fine-tuning fuel flow. The 1:1 boost reference prevents fuel pressure drop under boost.

This regulator is ideal for enthusiasts who require precise fuel management in modified or performance-oriented Honda/Acura vehicles. Fitment is confirmed through 2000 for Civic and 1997 for Accord/CL/Del Sol. 2025 and later model coverage is unconfirmed at time of listing.