★★★★★ 5
PRICES
GREAT
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Reviewed in the United States on October 5, 2025
Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished
Marsoni
M251S
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 - PolishedInjen Technology has done it once again with this new short ram air intake for the 2018 2021 Subaru WRX STI Equipped with the H4 2. 5L Turbo Engine. The Injen Technology SP1208 performance air intake system is the result of countless hours invested in research and development to provide a proven intake system designed to add power and performance to your STI. The Injen Technology SP1208 intake system is a direct replacement for that restrictive
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Your Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.0 ★★★★★
Based on 746 reviews
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Product Reviews
★★★★★ 5
Good filter
Pretty thick. May restrict airflow a little bit but it's a good filter.
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Reviewed in the United States on November 2, 2024
★★★★★ 5
Fits like a glove
Filter my air
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Reviewed in the United States on February 25, 2026
★★★★★ 5
Noticeable scent difference compared to factory standard
Smells clean for months. We are mainly gravel roads and these cabin filters do a great job
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Reviewed in the United States on April 3, 2026
★★★★★ 5
It fits perfectly.
Great replacement and a very good price.
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Reviewed in the United States on January 17, 2026
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