Fuel Rails

Fuel rails are the backbone of your engine's fuel delivery system, distributing pressurized fuel evenly to each injector. Whether you're building a high-horsepower forced-induction setup, switching to ethanol, or simply replacing a corroded factory rail, upgrading to a quality aftermarket fuel rail can improve fuel flow consistency and support higher demands.

Our collection includes a range of fuel rails from trusted manufacturers, designed with performance and reliability in mind. Key features often found in these rails include:

  • Billet aluminum construction for strength and corrosion resistance, often with a durable anodized finish
  • Larger internal bores to reduce pressure drop and supply high-volume injectors
  • Multiple inlet/outlet ports for flexible plumbing with aftermarket regulators, gauges, and return-style systems
  • Precision-machined injector ports that accept standard or oversized O-rings for a leak-free seal
  • Mounting brackets and hardware included in many kits for a straightforward bolt-on installation on popular intake manifolds

When selecting a fuel rail, consider your target power level, fuel type, and whether you're retaining the factory returnless system or converting to a return-style setup. Also verify injector height and port spacing to ensure compatibility with your manifold and injectors. If you're unsure which rail fits your build, our product listings include detailed specs and fitment notes to help you choose.

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Radium Engineering top-feed fuel rail conversion kit for Subaru EJ Version 1-6 engines.
$237.45 $249.95
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Radium Engineering machined aluminum top feed fuel rail conversion kit for Subaru EJ engines.
$218.45 $229.95
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Radium Engineering machined aluminum top feed fuel rails for 2002-2014 Subaru EJ engines.
$199.45 $209.95
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Anodized Radium Engineering top feed fuel rail for Nissan Silvia S13 SR20DET with 8AN ports and mounting hardware.
$218.45 $229.95
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A pair of black anodized Radium Engineering high-flow fuel rails for the Nissan R35 GT-R VR38DETT engine.
$332.45 $349.95
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Radium Engineering 20-0545 fuel rail plumbing kit with fittings and hardware for GM LSA and LS9 engines
$161.45 $169.95
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Radium Engineering machined fuel rail with 8AN ORB ports for Nissan RB25DET Neo engines.
$189.95 $199.95
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Radium 20-0533-PK fuel rail plumbing kit with black AN fittings and hose for early Mitsubishi 4G63 engines.
$75.95 $79.95
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Black anodized billet aluminum Radium high-flow fuel rail for Mitsubishi 4G63 early DSM engines.
$142.45 $149.95
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Radium Engineering fuel rail plumbing adapter kit including fittings for Mazda MZR and Ford Duratec fuel systems.
$56.95 $59.95
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Black Radium Engineering CNC machined fuel rail with four 8AN ORB ports for Mazda MZR and Ford Duratec engines.
$142.45 $149.95
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Radium Engineering fuel rail plumbing kit with high-pressure hoses and adapter fittings for Nissan VQ engines.
$208.95 $219.95
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Radium Engineering VQ35DE fuel rail plumbing kit with pre-assembled hoses and anodized fittings for 350Z and G35.
$208.95 $219.95
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Black anodized Radium Engineering secondary fuel rail for Mazda 20B-REW 3-rotor engines.
$227.95 $239.95
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Black anodized Radium Engineering fuel rails for Nissan VQ engines showing 8AN ORB ports and laser engraving.
$284.95 $299.95
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Black anodized Radium Engineering secondary top feed conversion fuel rail for Mazda 13B-REW rotary engines.
$189.95 $199.95
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Black anodized Radium Engineering high-flow secondary fuel rail for Mazda 13B-RE engines.
$161.45 $169.95
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Radium Engineering port injection adapter plate and fuel rail for Honda K20C1 engine.
$284.95 $299.95
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Radium Engineering fuel rail plumbing kit with fuel lines and fittings for 1999-2005 Mazda Miata.
$56.95 $59.95
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Radium Engineering fuel rail plumbing kit including hoses and fittings for 1994-1997 Mazda Miata
$47.45 $49.95
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Black anodized Radium Engineering high-flow fuel rail for 2006-2009 Honda S2000 with 8AN ORB ports
$142.45 $149.95
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Radium Engineering CNC machined aluminum fuel rail mounting bracket adapters for Subaru top-feed fuel rail conversion
$47.45 $49.95
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Anodized CNC machined aluminum Radium Engineering fuel rail for Toyota 2JZ-GE engines
$213.70 $224.95
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Anodized black CNC aluminum fuel rail for Honda B-Series engines featuring 8AN ORB ports.
$142.45 $149.95
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CNC machined aluminum Radium Engineering fuel rail for 1994-2005 Mazda Miata MX-5
$142.45 $149.95
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Radium Engineering precision-machined high-flow fuel rails for GM LS9 and LSA engines, part number 20-0362.
$427.45 $449.95
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Radium Engineering high-flow aluminum fuel rail kit for Nissan SR20DET with stainless hardware and idle motor spacers
$275.45 $289.95
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Black anodized CNC machined aluminum Radium Engineering fuel rail for Nissan SR20VE engines.
$208.95 $219.95
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Radium Engineering port injection fuel rail kit and hardware for 2013-2017 Ford Focus and Mustang EcoBoost engines.
$360.95 $379.95
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Radium Engineering black anodized aluminum top feed fuel rail for Nissan RB25DET engines
$256.45 $269.95
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