Ignitions and Electrical› Computers, Chips, Modules and Programmers

Link ECU

G4X PlugIn ECU

$2,109.75

SKU: LINK-243-4000

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$100 Minimum Order
Non-Returnable Item
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Overview

The Link ECU G4X PlugIn ECU is an engine management system designed to maximize your car's potential. It fits inside the factory OEM enclosure and requires no alteration of the factory wiring loom. This ECU supports specific North American Subaru models.
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The Link ECU G4X PlugIn ECU represents the latest in engine management technology, engineered to help you unlock the full potential of your vehicle. It comes shipped "locked" for security, and an unlock code must be obtained by calling or emailing. It supports the 2011-2014 WRX STI (GR/GV chassis code) with a manual transmission, and the 2015-2021 WRX STI (VA chassis code) equipped with an EJ series engine and a manual transmission. It is explicitly stated that the FA20 engine is not supported. Furthermore, this product is not CARB legal and cannot be sold or used in California or other CARB states. Models from 2008-2010 with the international Denso ECU pinout, and 2015 onwards WRX VAG models with the FA direct injection engine are also unsupported. It is crucial to verify that your vehicle's connector matches the header shown in the product photos before purchasing. Key features include advanced engine mapping capabilities, precision closed-loop cam control for up to four cams, sequential fuel delivery, and digital triggering for all OEM patterns. It also supports OEM idle hardware, offers 5D boost control with three switchable tables, and includes motorsport-specific features like anti-lag, launch control, and flat shifting. The ECU provides continuous barometric correction via an onboard sensor and features a dedicated CAN port for connecting devices using the CANJST4 cable, which also supplies a protected 3A continuous 12V power supply and ground. It supports many factory features such as DCCD, SiDrive, MFD display, ABS, stability control, hill start assist, and various CAN data streams for logging and other strategies. An air temperature sensor is highly recommended for optimal performance.

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.

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Specifications

BrandLink ECU
Part NumberLINK-243-4000
CategoryIgnitions and Electrical

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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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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.

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