Air and Fuel› Fuel Pumps, Regulators and Components
Lethal
L1E Dual Pump Fuel System
SKU: FI-42-821E
Moderate — 2–4 hours
Description
It features an in-tank supply system that retains the OE transfer, fuel level sender, and EVAP functionality. The system includes upgraded feed and return lines, a high-capacity filter, and a check valve. A flow-through t-block is direct-mounted on the HPFP inlet tube, and a high-capacity F1i regulator provides options for static and MAP reference. The included billet fuel rails are designed for proper port injection supply with E85, and the system is E85 capable when specific fuel pumps and filtration are selected.
Fitment
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Specifications
| Brand | Lethal |
| Part Number | FI-42-821E |
| Category | Air and Fuel |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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