Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Red

Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Red

Marsoni

M251S

$184.55

Get it in 3 business days with 1 day shipping. Friday, May 29

Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle RedSKU: SP1208WR UPC: 843115029746 Injen 18 21 Subaru WRX STI H4 2. 5L Turbo SP Aluminum Series Cold Air Intake Wrinkle Red This Injen SP Series cold air intake system upgrades 2018 2021 Subaru WRX STI models with a mandrel bent 6061 T6 aluminum tube in wrinkle red finish for maximum airflow and dyno proven gains up to 14 HP and 15 lb ft torque. It fits Base, Limited, S209, and Type RA submodels with bolt on installation that replaces stock airbox.

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I like that the cabin air filter has charcoal in it to which help absorb oder which adds functionality. The feel of this filter feels like a fabric is used which adds quality to it over the thin water ones out there in the market. The install was easy and fit right inside the filter location with ease. Even though this filter is a higher quality filter of OEM, it does not restrict any airflow whatsoever.

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Reviewed in the United States on October 13, 2025

Verified Purchase

Nicolas

Birmingham, US

★★★★★ 5

Service

Size: 14-22 2.0L hybrid

Looks like engine air filter, it’s smaller than needed; but needs to be compared. Haven’t looked at air cabin yet

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Reviewed in the United States on May 23, 2026

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