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Ignitions and Electrical› Computers, Chips, Modules and Programmers

Link ECU

G4X Honda/Acura K-Series Plug-In ECU

Name: G4X Honda/Acura K-Series Plug-In ECU
Brand: Link ECU
SKU: LNK-237-4000

$1,576.25

SKU: LNK-237-4000

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Link Plug-In G4X ECU is a standalone engine management system designed for Honda and Acura K-Series engines. It offers advanced features like sequential fuel injection, VTEC and VTC control, and onboard data logging. This ECU fits directly into the factory ECU enclosure, retaining the OEM connector for a clean installation without modifying the factory wiring on supported vehicles. It is compatible with manual transmissions only.

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The Link Plug-In G4X ECU provides a clean, high-performance upgrade for Honda and Acura K-Series engines without requiring extensive harness modifications. It is compatible with a range of K20A, K20A2, K20A3, K24A1, and D17A1 engines, making it suitable for models like the RSX, EP3 Civic Si, EM2/ES1, and K-swapped vehicles using 02-04 RSX wiring. Featuring Link's latest G4X technology, this ECU includes an onboard 7-bar MAP sensor, fast processing, and robust data logging capabilities. It supports advanced tuning functions such as sequential fuel injection, accurate ignition control, VTEC and VTC operation, launch control, traction control, and CAN communication. These features are crucial for optimizing performance in everything from street cars to dedicated race applications. Compatibility is restricted to manual transmission vehicles. Supported models include the 2002-2004 Honda Integra Type R DC5, 2002-2004 Acura RSX, 2001-2005 Honda Civic Type R EP3, 2002-2005 Honda Civic Si, 2001-2005 Honda Civic DX/LX/HX, and 2002-2004 Honda CR-V, as well as K-swapped vehicles using the specified engine/transmission. Important considerations before purchase include verifying the ECU connector matches the product images. This ECU is not compatible with automatic transmissions. For connecting CAN devices, the CANJST4 cable (101-0198) is required.

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

Brand	Link ECU
Part Number	LNK-237-4000
Category	Ignitions and Electrical

Videos

Link ECU Training | Lesson 1: Basic Setup

Essential Accessories for LINK G4X ECU | Maximize Performance & Engine Protection

New Link G4X K20 PnP ECU for EP3, DC5, CRV & Kswaps!

Pops and Bangs Ep 2: Wire-In ECUs VS Plug-In ECUs

Pops and Bangs Ep 3: Which LINK ECU is RIGHT FOR YOU

Overview of G4X Range

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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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