Stepone Tech

eFlexPlus Flex Fuel Conversion Kit

$799.00

SKU: U-EF-PLUS

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Stepone Tech eFlexPlus is a fully automatic flex fuel conversion kit designed to enable vehicles to run on any mixture of E85 and gasoline. By connecting under the hood, the system integrates seamlessly with the factory fuel system, allowing for real-time fueling adjustments that optimize performance without the need for ECU flashing or map switching. The kit is managed through the Bluetooth-enabled eFlexApp for iOS and Android, which provides users with monitoring capabilities for ethanol content, cold start settings, and various driving modes. Installation of the eFlexPlus is a DIY-friendly process that typically takes 2-4 hours, involving the use of provided plug-and-play wiring with quick couplers. Although the system installs parallel to the factory components to preserve OBD functionality and avoid triggering check engine lights, it does require fuel line modification. This kit is intended for standard builds; users with high-horsepower setups featuring upgraded injectors may need to consider the eFlexPro model for custom tuning requirements. Key features include the ability to deliver increased power and lower engine operating temperatures when using E85. Each kit comes with a 5-year warranty upon registration to ensure long-term reliability and support.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Available on iOS & Android

Specifications

BrandStepone Tech
Part NumberU-EF-PLUS
CategoryAir and Fuel

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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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