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Ignitions and Electrical› Computers, Chips, Modules and Programmers

Cobb

Flex Fuel Fuel Rail Kit

$654.50 $595.00 Save $59.50

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 intended for use when upgrading or rebuilding the fuel rail system for high-power or flex fuel applications. This kit is specifically designed for the 2008-2021 Subaru WRX STI with the EJ257 engine.
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 engine platform. This kit is an ideal component for those undertaking significant fuel system upgrades, whether for high-horsepower builds or flex-fuel conversions. It comes complete with all the necessary fittings and hardware, simplifying the installation process. The black finish offers a clean aesthetic under the hood. Key specifications include a -6AN fitting diameter and the inclusion of all necessary installation hardware.

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

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandCobb
Part NumberCOBB343250
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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