Engines and Components› Engines, Blocks and Components

IAG

800 FA20 DIT Closed Deck Long Block Engine

$18,999.99

SKU: JGJS-IAG-ENG-L800

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$100 Minimum Order
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Overview

The IAG 800 FA20 DIT Closed Deck Long Block Engine is a complete, timed crate engine designed for the 2015+ Subaru WRX. It offers significant ease of installation for customers seeking a drop-in engine package. All components are brand new and there is no core charge required.
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The IAG Performance Hand-Built 800 Subaru FA20F (DIT) is engineered for modified WRX vehicles, offering a complete, valve cover to valve cover, timed crate engine. This long block package is designed for significant ease of installation, providing a true plug-and-play solution for 2015+ Subaru WRX owners. Constructed with an aluminum engine block, aluminum crankshaft, and aluminum cylinder heads, this performance-grade engine features forged steel H-beam connecting rods and aluminum pistons. The IAG 800 heads boast CNC-machined combustion chambers, intake runners, and exhaust runners for optimized airflow. Key specifications include a 86.1mm bore diameter, 30mm exhaust valves made of stainless steel, and a power rating of 800 BHP. IAG has simplified the installation process, especially given the FA20F's complex timing system. All new timing components are pre-installed, allowing mechanics to focus on swapping manifolds, sensors, injectors, and external accessories. Most installations can be completed in a single day. This long block is specifically designed for the 2015-2021 Subaru WRX models, including Base, CVT, EyeSight, Limited, Premium, Raui Edition, STI, Sport, Sport-tech, and Sport-tech RS trims. IAG's Standard Long Block Workmanship Warranty covers the engine for 12 months or 12,000 miles. An extended warranty of up to 24 months/24,000 miles is available when purchased, installed, and tuned by an IAG Certified Installation Facility.

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

BrandIAG
Part NumberJGJS-IAG-ENG-L800
CategoryEngines and Components
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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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