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Air and Fuel› Fuel Injection Systems and Components - Electronic

Flex Fuel US

E85 Flex Fuel Conversion Kit

Name: E85 Flex Fuel Conversion Kit
Brand: Flex Fuel US
SKU: SK1100US

$799.00 $678.03 Save $120.97

SKU: SK1100US

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$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Flex Fuel US eFlexPlus E85 Flex Fuel Conversion Kit is an automatic system that allows your vehicle to run on E85, gasoline, or a blend of both. This kit includes an ECU that connects to a smartphone app, enabling you to select between economy, sport, and dynamic performance modes.

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The Flex Fuel US SK1100US E85 Flex Fuel Conversion Kit is designed to provide a seamless E85 conversion for 2008-2023 V8 HEMI Challengers. This kit offers the flexibility to run on E85, gasoline, or any combination, automatically adjusting fueling to optimize performance and eliminate knock. Installation is described as plug-and-play with minimal modifications, though it requires mechanical expertise and is estimated to take approximately 3 hours for DIY installation. The system integrates with a smartphone app, allowing users to select between Economy, Sport, and Dynamic performance modes. It also monitors ethanol content and duty cycle, without affecting the factory ECU, OBD, or triggering a Check Engine Light. Vehicles with upgraded fuel injectors or significant power adders like forced induction or cams are recommended to consider the eFlexPro system for more advanced tuning capabilities. The eFlexPlus kit verifies the compatibility of your vehicle's fuel injectors, fuel pump, and fuel lines before installation. It is not compatible with diesel engines, carbureted engines, or engines with mechanical fuel injection.

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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Specifications

Brand	Flex Fuel US
Part Number	SK1100US
Category	Air and Fuel

Videos

Do eFlexFuel E85 kits really make power WITHOUT tuning?

Plug and Play E85 Tuning: eFlexFuel Ethanol Conversion Kit

How to Install an eFlexFuel Conversion Kit on a Dodge Charger Hellcat Redeye

Part 1 l Before Installation l eFlexFuel Installation

eFlexMoto conversion kit installation to a motorcycle - get more power through E85 high octane 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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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