Engines and Components› Engines, Blocks and Components

IAG

800 FA20 DIT Closed Deck Long Block Engine with 86.1mm

$18,999.99

SKU: IAG-ENG-L800

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Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Professional / shop required

Overview

The IAG 800 FA20 DIT Long Block is a complete, pre-timed engine assembly designed for the 2015-2021 Subaru WRX. It features a closed deck conversion for enhanced structural support in high-boost applications.

This engine is built with all new components, eliminating the need for a core charge. It includes the IAG 800 FA20 Closed Deck Short Block and the IAG 800 FA20 Cylinder Head Package.
Show original supplier description
The IAG Performance 800 FA20 DIT Closed Deck Long Block Engine is engineered for enhanced performance and reliability in modified WRX vehicles. This hand-built engine comes equipped with IAG 800 heads and utilizes 86.1mm forged pistons constructed from 2618 T6 Alloy, providing robust construction for demanding applications. The case halves are CNC machined with O-ring receiver grooves and drilled/tapped to accept 1/2'' head studs, ensuring a secure and precise assembly. This long block is specifically designed for the FA20F (DIT) engine found in the 2015-2021 Subaru WRX models. For proper installation and guidance, it is recommended to consult fitment information if an item does not appear to fit your specific vehicle.

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 NumberIAG-ENG-L800
CategoryEngines and Components
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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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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