Note: While the FA24 is used in the Ascent, Legacy, and Outback XT, this WRX-specific variant features unique tuning and turbocharger mounting. Ensure your vehicle utilizes the 2.4L Turbocharged platform before ordering.
Installation & Technical Notes
The FA24 is a high-compression, direct-injected Boxer engine. To ensure a successful installation and maintain your warranty, please follow these technical guidelines:
Long Block Conversion: This sale includes the engine block, cylinder heads, and internal components. You must transfer your original USDM intake manifold, turbocharger assembly, intercooler, and wiring harness. This ensures 100% plug-and-play compatibility with your vehicle's ECU and emissions sensors.
Direct Injection & Fueling: Retain your original high-pressure fuel pump and injectors. If using JDM-supplied injectors, they must be verified for flow-rate compatibility with your local fuel grades (91/93 Octane).
RTV/Sealant Inspection: As with all modern FA-series engines, we recommend inspecting the oil pickup tube for any excess RTV silicone debris during the swap to ensure optimal oil pressure.
Essential Maintenance: We strongly recommend replacing the following parts during the swap:
Spark Plugs: Use only OEM Subaru/NGK Laser Iridium plugs (ILKAR8H6).
Engine Oil: 0W-20 Full Synthetic oil only (Strictly enforced for AVCS operation).
ECU Reset: After installation, use a professional scan tool to perform a "Learning Value Reset." This is critical for the ECU to adjust to the new engine’s volumetric efficiency and prevents "knock" during the initial break-in period.
JDM Seattle is a trusted Seattle-based supplier of Japanese Domestic Market (JDM) engines, JDM transmissions, and JDM auto parts, serving customers throughout Seattle and the surrounding Washington area. We specialize in authentic, low-mileage JDM engines and performance parts, directly imported from Japan and carefully inspected for quality and reliability.
Whether you’re replacing an engine, planning a swap, or upgrading performance, JDM Seattle is committed to delivering dependable Japanese import motors that provide the power, efficiency, and long-term reliability your vehicle demands.
Affordable Pricing
High-quality JDM parts at competitive prices, so you get more value for your money.
Fast Shipping
Quick and reliable shipping across the U.S. ensures your parts arrive fast and secure.
Expert Support
Friendly and knowledgeable team ready to help with all your JDM parts needs.