AEM 25-131BK High Volume Black Fuel Rail for Mitsubishi 4G63 Evo 8 and Evo 9

AEM High Volume fuel rails feature a 1/2-inch fuel bore to support fuel flow for applications up to 1,000 horsepower. This large bore also dampens backpressure pulses created by larger injectors and works perfectly with stock injector sizes. An additional 1/8th NPT port is included to accommodate a nitrous set up or fuel pressure gauge. A custom fuel line fitting is included for the factory fuel line, and in most cases the ends of each rail are pre tapped to accept -6 AN or 9/16"x18 fittings for users who want to use custom fuel lines. High Volume Fuel Rail, Black Anodized, Fits Mitsubishi 4G63 engine

• No additional parts required for installation - installs with factory fuel line using supplied fitting
• Comprehensive installation instructions, hardware, fittings and injector O-rings included
• 1/2 inch bore dampens backpressure pulses from larger fuel injectors
• 1/8 NPT port included for nitrous pick up or fuel pressure gauge
• Complete hardware, fittings and injector O-rings included
• Works with factory fuel line or custom fuel lines
• Specifically engineered for each application
• Pre-tapped for -6 AN or 9/16"x 18 fittings
• Supports fuel flow up to 1,000 horsepower
• Black anodizing with laser engraving
• CNC Machined from billet aluminum

The AEM 25-131BK High Volume Fuel Rail is engineered for Mitsubishi 4G63 applications, including the 2005-2006 Mitsubishi Lancer Evolution VIII and Evolution IX. Its large 1/2-inch fuel bore supports fuel flow for applications producing up to 1,000 horsepower while helping dampen backpressure pulses generated by larger fuel injectors. The rail also works effectively with stock injector sizes, making it a versatile upgrade for both street and competition fuel systems.

Installation is simplified with the supplied custom fitting for the factory fuel line, so no additional installation parts are required in most applications. The rail includes an additional 1/8-inch NPT port for connecting a fuel pressure gauge or nitrous system pickup. The rail ends are pre-tapped to accept -6 AN or 9/16-inch x 18 fittings, allowing compatibility with custom fuel lines when configuring a modified fuel system.

CNC machined from billet aluminum, the AEM 25-131BK features a durable black anodized finish with laser engraving. Comprehensive installation instructions, mounting hardware, fuel fittings, and injector O-rings are included. This application-specific design provides a secure fit and supports reliable fuel delivery for upgraded Mitsubishi 4G63 engines. Confirm injector style and vehicle application before installation.

Key Product Specifications and Technical Data

• Brand: AEM
• Part Number: 25-131BK
• Product Type: High volume fuel rail
• Engine Application: Mitsubishi 4G63
• Fuel Bore: 1/2 inch
• Fuel System Capacity: Supports applications up to 1,000 horsepower
• Additional Port: 1/8-inch NPT
• Construction and Finish: CNC-machined billet aluminum with black anodizing

What's Included

• High volume black fuel rail
• Factory fuel line fitting
• Custom fuel line fittings
• Mounting hardware
• Injector O-rings
• Installation instructions

Fitment: Fits 2005-2006 Mitsubishi Lancer Evolution VIII and Evolution IX models equipped with the 4G63 engine. This product is not CARB approved and may not be legal for use on pollution-controlled vehicles in all areas. Check applicable emissions regulations before installation.

Features:

• High-flow 1/2-inch fuel bore supports fuel delivery for applications up to 1,000 horsepower.
• Large internal bore helps dampen backpressure pulses from larger fuel injectors while remaining compatible with stock injector sizes.
• Supplied factory fuel line fitting allows installation without additional parts in most applications.
• Integrated 1/8-inch NPT port supports a fuel pressure gauge or nitrous system pickup.
• Pre-tapped rail ends accept -6 AN or 9/16-inch x 18 fittings for custom fuel line configurations.
• CNC-machined billet aluminum construction provides a precise, application-specific design.
• Black anodized finish with laser engraving offers durable surface protection and clear identification.
• Includes installation instructions, hardware, fittings, and injector O-rings for a complete installation.

Fitments:
2005 Mitsubishi Lancer Evolution
2005 Mitsubishi Lancer Evolution MR
2005 Mitsubishi Lancer Evolution RS
2006 Mitsubishi Lancer Evolution
2006 Mitsubishi Lancer Evolution MR
2006 Mitsubishi Lancer Evolution RS
2006 Mitsubishi Lancer Evolution SE

Air Freight Prohibited: false
Not Carb Approved: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: true
Regular Stock: t
Units Per Sku: 1