Air and Fuel› Performance Packages

Dnx

Flex Fuel Kit

$393.75

SKU: 6GCFFK-PTFE

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The DSX Tuning flex fuel kit is a plug-and-play solution for adding flex fuel capability to Gen IV/Gen V GM V8 vehicles. This kit enables the use of fuels ranging from pure gasoline to pure ethanol, allowing you to unlock your setup's true power potential, especially in forced induction scenarios. It facilitates seamless switching between gasoline and ethanol without needing to monitor fuel content or reflash your tune. The kit features 100% clip-together plumbing, requiring no wrenches for installation.
Show original supplier description
The DSX Tuning flex fuel kit is the original plug-and-play solution for adding flex fuel capability to Gen IV and Gen V GM V8 vehicles. This system allows you to run any blend of gasoline and ethanol, unlocking the true power potential of your setup, particularly beneficial for forced induction applications. The kit enables seamless switching between fuels without the need for manual fuel content monitoring or ECU reflashing. This kit includes a crimped and pressure-tested PTFE line to replace the factory over-the-engine line. It features an 8AN line with 6AN connections, ensuring true flow of a 3/8" line without significant restriction at the hose end. The plumbing kit is constructed from corrosion-resistant materials for ease of installation. A plug-and-play wiring harness, made with OEM connectors and terminals crimped using OEM tooling, is also included, along with a DSX Tuning 3D-printed fuel line disconnect. DSX manufactured components are covered against defects in materials and workmanship for the life of the product. GM sensors included in the kit are warranted for 90 days.

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

BrandDnx
Part Number6GCFFK-PTFE
CategoryAir and Fuel
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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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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