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

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

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 - PolishedSKU: SP1208P UPC: 843115029739 Injen 18 21 Subaru WRX STI H4 2. 5L Turbo SP Aluminum Series Cold Air Intake Polished Transform airflow in your 2018 2021 Subaru WRX STI with the Injen SP1208P SP Aluminum Series Cold Air Intake in polished finish. Engineered for the H4 2. 5L Turbo, it replaces stock airbox for dyno proven gains of 12 HP and 13 lb ft torque. Hear the aggressive throaty tone while enjoying reliable filtration and power delivery. Key

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Good product, not much to say. The product arrived quickly, looks to be of high quality construction, fit perfectly and took me only a couple of minutes to install. I love it when a product is no frills and delivers as advertised. I've used various filters from K&N before and have always had very good success with them so I will be buying more of these for sure when the time comes.

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Reviewed in the United States on November 9, 2025