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affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Allows your JB4 to control a WMI pump and solenoid for dynamic progressive flow mapping!
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For most JB4 applications.
This product was last offered at the strikethrough price on
05-02-2026
With Single BM12 Nozzle, Steel Braided Hardline Upgrade, and 3 Gallon Stealth Tank
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Universal Performance Injectors
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Plug-and-Play flex fuel kit for your BMW!
ALL SALES FINAL. ITEMS MAY BE DAMAGED OR MISSING COMPONENTS. PLEASE SEE IMAGES BEFORE PURCHASING. Want To Haggle? Give Us A Call Or Chat To Make An Offer On This Product! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This product was last offered at the strikethrough price on
05-02-2026
Red High Temp Nylon Tubing, Quick-Connect Fittings
ALL SALES FINAL. ITEMS MAY BE DAMAGED OR MISSING COMPONENTS. PLEASE SEE IMAGES BEFORE PURCHASING. Want To Haggle? Give Us A Call Or Chat To Make An Offer On This Product! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This product was last offered at the strikethrough price on
05-02-2026
Conveniently control a second or third low pressure fuel pump!
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Heavy-duty yet compact tank that is compact and flexible allowing for a wide range of mounting on any flat vertical surface in the trunk.
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Know your exact ethanol content in real-time via the Fuel-It! or JB4 mobile app on your smartphone or tablet. For non Fuel-It! brand port injection configs.
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Fueling support up to 1000+ WHP!
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Know your exact ethanol content in real-time via the Fuel-It! or JB4 mobile app on your smartphone or tablet.
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Know your exact ethanol content in real-time via the Fuel-It! or JB4 mobile app on your smartphone or tablet. For stock HPFP/no port injection configurations.
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Controls fuel delivery and pump pressure from the tank
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Engages water-methanol system at 35PSI
Adjustable from 25-50psi
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Includes 2.5 gallon tank, red high temp nylon tubing, and quick-connect fittings
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Direct port injection plate for clean WMI installs
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms