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  •  AEM Digital Oil Pressure Gauge, AEM-30-4407
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    AEM Digital Oil Pressure Gauge, AEM-30-4407

    $219.95
    AEM-30-4407
  •  AEM Digital Volt Gauge, AEM-30-4400
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    AEM Digital Volt Gauge, AEM-30-4400

    $139.95
    AEM-30-4400
  •  AEM Ethanol Content Flex Fuel Sensor Kit -6 AN, AEM-30-2201
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    AEM Ethanol Content Flex Fuel Sensor Kit -6 AN, AEM-30-2201

    $301.95
    AEM-30-2201
  •  AEM High Output Inductive Coil, 30-2852
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    AEM High Output Inductive Coil, AEM-30-2852

    $79.95
    AEM-30-2852
  •  AEM High Volume Fuel Rail Black Acura B18B1, B18C1 & B18C5, 25-100BK
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    AEM High Volume Fuel Rail Black Acura B18B1, B18C1 & B18C5, AEM-25-100BK

    $146.95
    AEM-25-100BK
  •  AEM High Volume Fuel Rail, Honda F22A1, F22A4, F22A6, H22A1, H22A4 & H23A1, AEM-25-104BK
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    AEM High Volume Fuel Rail, Honda F22A1, F22A4, F22A6, H22A1, H22A4 & H23A1, AEM-25-104BK

    $149.95
    AEM-25-104BK
  •  AEM Tru-Time Adjustable Cam Gear Black 5-Bolt Mitsubishi, 23-831BK
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    AEM Tru-Time Adjustable Cam Gear Black 5-Bolt Mitsubishi, AEM-23-831BK

    $188.95
    AEM-23-831BK
  •  AEM Tru-Time Adjustable Cam Gear, AEM-23-802BK
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    AEM Tru-Time Adjustable Cam Gear, AEM-23-802BK

    $124.95
    AEM-23-802BK
  •  AEM Tru-Time Adjustable Cam Gear. Black. 5-Bolt
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    AEM Tru-Time Adjustable Cam Gear. Black. 5-Bolt, AEM-23-830BK

    $200.95
    AEM-23-830BK
  •  AEM V2 Water/Methanol HD Controller Kit Internal MAP w 40psi, 30-3306
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    AEM V2 Water/Methanol HD Controller Kit Internal MAP w 40psi, AEM-30-3306

    $189.95
    AEM-30-3306
  •  AEM V2 Water/Methanol Standard Controller Kit, AEM-30-3304
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    AEM V2 Water/Methanol Standard Controller Kit, AEM-30-3304

    $189.95
    AEM-30-3304
  •  AEM V3 Water/Methanol Multi-Input Controller Kit, AEM-30-3305
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    AEM V3 Water/Methanol Multi-Input Controller Kit, AEM-30-3305

    $189.95
    AEM-30-3305
  •  AEM Water/Methanol Injection 200psi Recirculation Pump 3/8 NPT Fittings, 30-3018
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    AEM Water/Methanol Injection 200psi Recirculation Pump 3/8 NPT Fittings, AEM-30-3018

    $199.95
    AEM-30-3018
  •  AEM Wideband UEGO Replacement O2 SENSOR, 30-2001
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    AEM Wideband UEGO Replacement O2 SENSOR, AEM-30-2001

    $102.95
    AEM-30-2001
  •  AEM X-Series OBDII Gauge, 30-0311
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    AEM X-Series OBDII Gauge, AEM-30-0311

    $163.95
    AEM-30-0311
  •  AEM X-Series Temperature Gauge 100~300F / 40~150C Accessory Kit, AEM-30-0302-ACC
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    AEM X-Series Temperature Gauge 100~300F / 40~150C Accessory Kit, AEM-30-0302-ACC

    $19.95
    AEM-30-0302-ACC
  •  AEM X-Series Wideband UEGO Controller Gauge Accessory Kit, 30-0300-ACC
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    AEM X-Series Wideband UEGO Controller Gauge Accessory Kit, AEM-30-0300-ACC

    $12.95
    AEM-30-0300-ACC
  • ARP Headstuds ARP 1/4" Carrillo Replacement 1/4" CA625+ Rod Bolt Kit, 300-6709
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    ARP 1/4" Carrillo Replacement 1/4" CA625+ Rod Bolt Kit, 300-6709

    $277.72
    ARP-300-6709

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About Us

quantum fuel systems blk

QFS was born from a desire for freedom: the freedom to keep your ATV, dirt bike, car, or truck running with dependable, OEM-quality, and affordable fuel systems. We want you back on the road without breaking the bank. Skip the costly dealership—our replacement parts ship directly to you and are easy to install. Enjoy OEM performance with unbeatable US-based support and a lifetime warranty. Are you with us?

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