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Air and Fuel› Air Cleaners, Filters, Intakes and Components

ETS

Replacement Air Filter

Name: Replacement Air Filter
Brand: ETS
SKU: SP-3603

$60.00

SKU: SP-3603

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Beginner — under 30 min

Overview

The ETS SP-3603 is a replacement air filter designed for ETS Stock Turbo Intake Systems. It is compatible with the 2015-2021 Subaru WRX and the 2022-2026 Subaru WRX. This filter is sold individually as a replacement part for those needing a new one.

Show original supplier description

The ETS Replacement Air Filter (SP-3603) is engineered to be a direct replacement for the filter included in ETS Stock Turbo Intake Systems. This air filter is specifically designed to work with the 2015-2021 Subaru WRX and the 2022-2026 Subaru WRX models when equipped with ETS Turbo Intake Kits. This filter is sold individually, providing a convenient solution for owners who need to replace their existing ETS intake filter. Multiple user reviews highlight its effectiveness and the enhanced "spooly sneezy noises" and "engine bay looks" after installation. Many users consider it an excellent replacement filter that fits perfectly and contributes to improved sound. While this ETS-branded filter is available, the source material also notes that the K&N RU-2800 Air Filter is an identical alternative and can be purchased separately. This offers flexibility for consumers seeking the same performance and fitment characteristics.

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	ETS
Part Number	SP-3603
Category	Air and Fuel

Videos

2022+ WRX ETS Intake Install (Updated Design) + Sound Clips

Putting an ETS intake on our 2022 WRX. CRAZY turbo noises!

2023 VB Subaru WRX Ultimate Intake Test: Stock vs Drop-in filter vs modded vs ETS intake.

2015 Subaru WRX ETS Intake

Installing the ETS Intake on our 2022 WRX | How much power does it make?

2022 WRX ETS Intake 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.

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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