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Air and Fuel› Intake Manifolds and Components

Process West

FA20DIT Hybrid Intake Manifold

Name: FA20DIT Hybrid Intake Manifold
Brand: Process West
SKU: PWIM007

$1,744.10 $1,691.78 Save $52.32

SKU: PWIM007

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$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Process West intake manifold is a performance-oriented upgrade for 2015-2021 Subaru WRX models equipped with the FA20DIT engine. It features a hybrid construction with a billet aluminum plenum and cast large bore runners to improve airflow and cylinder filling.

Show original supplier description

The Process West DITTO (Direct Injection Tubular Original) intake manifold is engineered to optimize volumetric efficiency for the 2015-2021 Subaru WRX. The unit combines a billet aluminum plenum with cast large bore runners to increase overall volume and provide superior cylinder filling compared to the factory component. This intake is part of a "NO CEL" product range, allowing for direct installation on a standard vehicle without requiring immediate ECU tuning or triggering a Check Engine Light. However, users seeking to maximize performance gains can see further improvements through custom tuning. Please note that this product is specifically designed for the FA20DIT platform. For users installing this manifold alongside a Process West Verticooler, the dedicated Verticooler Fitting Kit (part number PWIM007VFT) is required for proper integration. Hardcore tuners may also consider the separate DITTO RACE version, which includes four additional port injector mounts compatible with EV-14 specification fuel injectors to support high-horsepower builds.

Vehicle Symptoms

Loss of top-end power under hard acceleration
Poor throttle response and hesitation
Engine feels restricted at high RPM
Turbo lag more noticeable than expected
Car doesn't pull as hard after 5000 RPM

Relevant Conversations

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FA20DIT intake manifold vs stock performance
How to install Process West intake manifold WRX
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2015 WRX car feels slow after 5000 RPM fix

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	Process West
Part Number	PWIM007
Category	Air and Fuel

Videos

NEW FA20 Intake Manifold From Process West Unboxing

15-21 WRX Process West Intake Manifold Install

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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.

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