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Ignitions and Electrical› Computers, Chips, Modules and Programmers

Collins

G4X PlugIn ECU for Subaru WRX STI V10 EJ25 2.5L

$2,634.50 $2,175.00 Save $459.50

SKU: WRX104X

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

The Link WRX104X is a G4X PlugIn ECU designed for Subaru WRX and STI V10 models. It offers the latest engine management technology to maximize your car's potential. This ECU fits inside the factory OEM enclosure with no alteration of the factory wiring loom required for compatible models. It is designed for the 2.5L EJ25 engine with manual transmissions and electronic throttle.
Show original supplier description
The Link WRX104X is a G4X PlugIn ECU engineered by Link Engine Management to provide advanced engine control for Subaru WRX and STI V10 models. It is built to maximize the performance potential of your car by offering the latest in engine management technology. This specific ECU is designed for the WRX V10 EJ25 engine, catering to 2.5L displacements produced between 2004 and 2007. It is exclusively for vehicles equipped with manual transmissions and electronic throttle control. While it covers the 2004-2006 model years primarily, some 2007 models may be compatible, but require confirmation by checking for the presence of wires on pins A1-3 in the connector. Key features and considerations include the recommendation of an air temperature sensor for optimal performance. Most factory features are retained and supported. The ECU also offers I/O expansion options, which can be explored in the features tab. An installation manual is available for download to guide the setup process.

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

BrandCollins
Part NumberWRX104X
CategoryIgnitions and Electrical
5,000+ Trusted brands
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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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