Air and Fuel› Fuel Injection Systems and Components - Electronic

Cobb Tuning

Flex Fuel Conversion Kit

$119.00

SKU: COBB343250

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

Moderate — 2–4 hours

Overview

It is specifically intended for the EJ257 platform, used when upgrading or rebuilding the fuel rail system for high-power or flex fuel builds. All necessary fittings and hardware are included for installation.
Show original supplier description
The Cobb Tuning Fuel Rail Line Kit provides essential fuel supply and return lines for high-flow fuel rail installations on the EJ257 platform. This kit is crucial for those looking to upgrade or rebuild their fuel rail system to support high-power applications or flex fuel conversions. Engineered for the 2008-2021 Subaru WRX STI, this kit ensures proper fuel delivery for enhanced performance. It includes all necessary fittings and hardware, simplifying the installation process. The black finish offers a clean aesthetic under the hood. The fitting diameter is -6AN, a common standard for performance fuel systems. Cobb Tuning, established in 1999, has a strong reputation for developing performance software and hardware for turbocharged vehicles. Their integrated approach to product development means that hardware components like this fuel rail line kit are validated as part of a complete system, ensuring consistent and reliable results.

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

BrandCobb Tuning
Part NumberCOBB343250
CategoryIgnitions and Electrical
5,000+ Trusted brands
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(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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