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  • 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

    $206.95
    AEM-30-3018
    Add to Cart
  • 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
    Add to Cart
  • AEM X-Series OBDII Gauge, 30-0311
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    AEM X-Series OBDII Gauge, AEM-30-0311

    $163.95
    AEM-30-0311
    Add to Cart
  • 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

    $24.12
    AEM-30-0302-ACC
    Add to Cart
  • 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

    $12.03
    AEM-30-0300-ACC
    Add to Cart
  • 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
    Out of stock
  • ARP Headstuds ARP 1/4" Carrillo Replacement ARP3.5 Rod Bolt Kit, 300-6609
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    ARP 1/4" Carrillo Replacement ARP3.5 Rod Bolt Kit, 300-6609

    $323.38
    ARP-300-6609
    Out of stock
  • ARP Headstuds ARP 3 S GTE Toyota 12Pt Head Stud Kit, 203-4204
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    ARP 3 S GTE Toyota 12Pt Head Stud Kit, 203-4204

    $186.72
    ARP-203-4204
    Out of stock
  • ARP Headstuds ARP 3/8" ARP3.5 Carrillo Replacement Rod Bolt Kit, 300-6602
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    ARP 3/8" ARP3.5 Carrillo Replacement Rod Bolt Kit, 300-6602

    $954.95
    ARP-300-6602
    Out of stock
  • ARP Headstuds ARP 426 Hemi 1/2" 12Pt Head Stud Kit, 245-4202
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    ARP 426 Hemi 1/2" 12Pt Head Stud Kit, 245-4202

    $347.13
    ARP-245-4202
    Out of stock
  • ARP Headstuds ARP 426 Hemi 1/2" Head Stud Kit, 145-4002
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    ARP 426 Hemi 1/2" Head Stud Kit, 145-4002

    $280.71
    ARP-145-4002
    Out of stock
  • ARP Headstuds ARP 426 Hemi 7/16" 12Pt Head Stud Kit, 245-4203
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    ARP 426 Hemi 7/16" 12Pt Head Stud Kit, 245-4203

    $272.83
    ARP-245-4203
    Out of stock
  • ARP Headstuds ARP 5/16 General Replacement ARP2000 Rod Bolt Kit, 200-6210
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    ARP 5/16 General Replacement ARP2000 Rod Bolt Kit, 200-6210

    $74.40
    ARP-200-6210
    Out of stock
  • ARP Headstuds ARP 5/16" ARP3.5 Carrillo Replacement Rod Bolt Kit, 300-6608
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    ARP 5/16" ARP3.5 Carrillo Replacement Rod Bolt Kit, 300-6608

    $375.98
    ARP-300-6608
    Out of stock
  • ARP Headstuds ARP 7/16" 3.5 Carrillo,Lentz, Ferrera Replacement, 300-6601
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    ARP 7/16" 3.5 Carrillo,Lentz, Ferrera Replacement, 300-6601

    $1,045.46
    ARP-300-6601
    Out of stock
  • ARP Headstuds ARP BB Chevy 1/2" W/Alum Block Head Stud Kit, 135-4206
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    ARP BB Chevy 1/2" W/Alum Block Head Stud Kit, 135-4206

    $378.23
    ARP-135-4206
    Out of stock
  • ARP Headstuds ARP BB Chevy 3/8 X 1.670 SS Header Stud Kit, 400-1403
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    ARP BB Chevy 3/8 X 1.670 SS Header Stud Kit, 400-1403

    $177.16
    ARP-400-1403
    Out of stock
  • ARP Headstuds ARP BB Chevy 4-Bolt Main Stud Kit, 135-5601
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    ARP BB Chevy 4-Bolt Main Stud Kit, 135-5601

    $180.18
    ARP-135-5601
    Out of stock

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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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