Radium Engineering 20-0112-12 Billet Fuel Rail for 2008-2015 Mitsubishi Evo X

Vehicle Fitment

• 2008-2015 Mitsubishi Lancer Evolution X (All Trims: GSR, MR, SE, Final Edition; 4B11T 2.0L DOHC 16-Valve Turbocharged Inline-4; AWD)

Fitment Notes

• This is the 20-0112-12 rail-only basic kit. It includes the fuel rail and mounting hardware only. All AN fittings for the inlet, outlet, and center ports must be purchased separately. If you require a complete drop-in solution with fittings for the OEM feed line and factory fuel pressure regulator, order the 20-0112-10 (OEM configuration kit) instead. If you already have the rail and need only the plumbing components, the 20-0112-PK plumbing kit is available separately.
• This fuel rail is compatible with factory OEM-equivalent fuel injectors. If installing aftermarket high-flow injectors, consult the injector manufacturer for dimensional compatibility. Radium Engineering specifies "OEM equivalent" injector compatibility and does not provide further injector dimension guidance.
• All three ports on the 20-0112-12 rail use 8AN ORB (3/4-16 O-ring boss) threads: one inlet port (fuel feed), one center port, and one end/outlet port. The 20-0112-10 OEM configuration uses different port threading to interface with the factory feed line directly; the 20-0112-12 requires AN fittings throughout for a custom fuel system build.
• The optional Radium Fuel Pulsation Damper-R (FPD-R) can be installed in either the center port or the outlet port of this rail. The larger FPD-XR can only be used in the center port - installing the FPD-XR in the outlet port will cause interference with the MIVEC solenoid.
• If re-using the OEM fuel pressure regulator, the Radium two-piece FPR adapter 20-0301 is required to interface the factory FPR with the end port of this rail.
• Ample clearance around all fuel rail ports must be confirmed before adding larger accessories such as fuel pressure regulators, pressure gauges, or pulse dampers. Reference Radium's dimensional drawings on their product page to verify clearance in your specific engine bay configuration.
• This product is not CARB legal and is not legal for use on emissions-controlled vehicles in California or other CARB-compliant states.

Features

• 0.69" (17.5mm) internal bore - substantially larger than the OEM fuel rail's internal diameter, reducing fuel flow restriction and maintaining consistent fuel pressure delivery to all four injectors under high-demand fueling conditions including large injectors, flex fuel, and high-horsepower turbocharged builds
• CNC machined from solid 6061 aluminum billet - precision machining from aircraft-grade aluminum billet ensures dimensional accuracy at all injector bores, mounting surfaces, and port threads, producing a direct bolt-on fit without shimming or modification
• Bright-dip black anodized finish - bright-dip anodizing produces a harder and more uniform surface than standard anodizing, providing superior corrosion resistance and a consistent high-quality appearance that holds up to the heat, fuel, and cleaning chemicals of ongoing engine maintenance
• Laser etched part number and logo - permanent laser etching on the rail body provides a clean, professional appearance and lasting identification that will not peel, fade, or chip under normal service conditions
• Compatible with all fuel types - gasoline, diesel, E85, ethanol, methanol, and all alcohol-based fuel blends are fully supported without any material substitution or coating concerns, making this rail a permanent solution for flex-fuel and methanol injection builds
• Three 8AN ORB ports with full custom configuration flexibility - the inlet, center, and end ports each accept any 8AN ORB fitting, enabling a wide range of custom fuel system configurations including dual feed, return-style, and returnless setups with aftermarket regulators, pressure gauges, and pulse dampers
• First and only Evo X fuel rail on the market designed to support an optional fuel pulsation damper - injector opening and closing generates pressure pulses in the fuel rail that destabilize fuel pressure, particularly at high injector duty cycles; the center port's compatibility with Radium's FPD-R and FPD-XR pulse dampers allows this issue to be directly addressed in the same rail without additional adapters or brackets
• Stainless steel mounting hardware included - replacement M8 socket head mounting bolts and M6 FPR hard line hardware eliminate the need to reuse OEM fasteners during installation

Specifications

• Part Number: 20-0112-12
• Application: 2008-2015 Mitsubishi Lancer Evolution X (4B11T)
• Kit Type: Rail Only (Basic Kit) - fittings not included
• Internal Bore Diameter: 0.69 in. (17.5mm)
• Material: 6061 Aluminum Billet
• Finish: Bright-Dip Black Anodized, Laser Etched
• Port Thread: 8AN ORB (3/4-16 O-Ring Boss) - all 3 ports
• Mounting Bolts: M8 Socket Head (stainless steel, included)
• Injector Compatibility: OEM-equivalent top-feed injectors
• Fuel Compatibility: All fuel types including E85, ethanol, methanol
• CARB Compliance: Not CARB legal

Included Components

• 1x CNC Machined 6061 Aluminum Billet Fuel Rail, Bright-Dip Black Anodized, Laser Etched
• 2x M8 Stainless Steel Socket Head Mounting Bolts
• M6 Stainless Hardware for FPR Hard Line Bracket (where applicable)
• Note: No AN fittings are included. All port fittings must be ordered separately.

Product Description

The Radium Engineering 20-0112-12 is a CNC machined 6061 billet aluminum fuel rail designed as a direct-fit upgrade for the 2008-2015 Mitsubishi Lancer Evolution X equipped with the 4B11T turbocharged inline-4 engine. The rail's 0.69" internal bore is significantly larger than the OEM fuel rail, eliminating the flow restriction that the factory rail imposes on high-output builds running large injectors, E85, or elevated fuel pressure. All three ports - inlet, center, and end/outlet - use 8AN ORB threads, providing maximum compatibility with aftermarket AN fittings and enabling the full range of custom fuel delivery configurations from basic single-feed setups to fully custom dual-feed and return-less systems. The bright-dip black anodized finish and laser etching give the rail a clean motorsport aesthetic that complements any Radium fuel system build on the Evo X platform.

The 20-0112-12 is the rail-only basic kit. It includes the rail and stainless mounting hardware, but no AN fittings - all port fittings must be sourced separately, which gives builders full flexibility in choosing fitting configurations for their specific application. Builders who want a simpler drop-in solution compatible with the OEM feed line and factory fuel pressure regulator should instead order the 20-0112-10, which comes pre-configured with the necessary adapters. Radium also offers the 20-0112-PK plumbing kit separately for those who have the rail and need only the fittings to complete the OEM-style installation. One of the standout features of this rail is its native support for Radium's optional Fuel Pulsation Damper (FPD-R or FPD-XR), which threads directly into the center or end port - the only Evo X fuel rail on the market to offer this integration. Fuel pressure pulsation from injector operation becomes increasingly significant at high injector duty cycles and can cause unstable fuel pressure, erratic idle, and AFR inconsistency; the ability to mount a pulse damper directly to the rail without additional hardware is a meaningful advantage on built high-horsepower Evo X applications. This product is not CARB legal and is intended for track, motorsport, and off-road use only in CARB-compliant states.