Injen SP Short Ram Air Intake System - Wrinkle Black Finish - 2015-2021 Subaru WRX / STI
Injen SP Short Ram Air Intake System - Wrinkle Black Finish - 2015-2021 Subaru WRX / STI
Injen
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PRODUCT DETAILS
INJEN SP SHORT RAM AIR INTAKE
Injen Technology introduces the SP Short Ram Air Intake for the 2018-2021 Subaru WRX STI, a testament to its expertise in enhancing power and performance. Designed as a direct replacement for the factory airbox, the SP Short Ram Air Intake ensures a seamless, plug-and-play installation that unlocks the turbo's full potential without necessitating additional tuning. As part of Injen's flagship SP series, this intake features patented tuning processes, including MegaRam (MR) Technology and Air Fusion, solidifying Injen's position as a leader in the performance aftermarket.
The 6061-T6 aluminum intake tube optimizes airflow, delivering both power gains and a sleek aesthetic under the hood. Maintaining a safe Air/Fuel (A/F) ratio throughout the power band, this intake includes a fully serviceable Injen SuperNano-Web dry air filter, increased airflow surface area, and an aggressive engine tone. Offered in multiple finishes, the SP Short Ram Air Intake is backed by Injen's Limited Lifetime Warranty, providing assurance of enduring performance.
KEY HIGHLIGHTS
-
Perfect Fit:
- Engineered for 2018-2021 Subaru WRX STI H4-2.5L Turbo
-
Proven Performance Boost:
- Realize up to 26 hp and 24 lb-ft. of torque
-
Cutting-Edge Design:
- Features Injen’s MegaRam (MR®) Technology for unmatched performance
- MR Technology Benefits: Substantial power gains while maintaining critical Air/Fuel (A/F) ratios
-
Easy Installation:
- Plug-and-play design requires no additional tuning
- Eliminates the risk of triggering check engine lights
-
Sturdy Build:
- 3.250in mandrel-bent 6061-T6 aluminum intake tubing for maximum durability
-
Effective Heat Management:
- Custom heat shield designed for precise application
-
Top-notch Filtration:
- Fully serviceable Injen SuperNano-Web dry air filter ensures lasting performance
-
Customizable Appearance:
- Available in various finishes to suit individual tastes
-
Distinctive Sound:
- Produces an aggressive engine tone under full throttle, enhancing the driving experience
-
Optimized Airflow:
- Streamlined intake piping eliminates restrictions, promoting improved airflow
-
American Craftsmanship:
- Crafted with pride in Pomona, California
-
Warranty Peace of Mind:
- Backed by Injen Technology Limited Lifetime Warranty
Important Note:
- Not CARB exempt; unavailable for purchase in California.
- Not suitable for use on vehicles registered with the California Department of Motor Vehicles.
WHY WE CARRY THIS
We only list parts we’d run ourselves or recommend to a friend building a real car. If it feels vague, unverified, or inconsistent, it doesn’t make the cut.
- Fitment-first mindset — no “universal” roulette
- Brand reputation matters — we favor proven manufacturing
- Support that actually responds with real answers
WHAT TO EXPECT
This is the clean path: correct fitment, clean install, and results that match the intent.
- Install-ready experience with correct mounting where provided
- Finish that holds up to real driving, not just photos
- Selections on this page drive the exact fitment shipped
TRUST, BUILT INTO THE PROCESS.
Anyone can list parts. We curate what belongs on a serious build. Our goal is simple: fewer surprises, cleaner installs, and confidence when you hit “Buy.”
Fitment checked
We prioritize vehicle-specific listings and clear selection logic so you’re not gambling on compatibility.
Brand discipline
Proven manufacturing and consistent quality matter more than hype. We bias toward what actually holds up.
Real support
If you have a question, you’ll get a human answer that helps you finish the build — not a copy-paste shrug.
INJEN SP SHORT RAM AIR INTAKE
Injen Technology introduces the SP Short Ram Air Intake for the 2018-2021 Subaru WRX STI, a testament to its expertise in enhancing power and performance. Designed as a direct replacement for the factory airbox, the SP Short Ram Air Intake ensures a seamless, plug-and-play installation that unlocks the turbo's full potential without necessitating additional tuning. As part of Injen's flagship SP series, this intake features patented tuning processes, including MegaRam (MR) Technology and Air Fusion, solidifying Injen's position as a leader in the performance aftermarket.
The 6061-T6 aluminum intake tube optimizes airflow, delivering both power gains and a sleek aesthetic under the hood. Maintaining a safe Air/Fuel (A/F) ratio throughout the power band, this intake includes a fully serviceable Injen SuperNano-Web dry air filter, increased airflow surface area, and an aggressive engine tone. Offered in multiple finishes, the SP Short Ram Air Intake is backed by Injen's Limited Lifetime Warranty, providing assurance of enduring performance.
KEY HIGHLIGHTS
-
Perfect Fit:
- Engineered for 2018-2021 Subaru WRX STI H4-2.5L Turbo
-
Proven Performance Boost:
- Realize up to 26 hp and 24 lb-ft. of torque
-
Cutting-Edge Design:
- Features Injen’s MegaRam (MR®) Technology for unmatched performance
- MR Technology Benefits: Substantial power gains while maintaining critical Air/Fuel (A/F) ratios
-
Easy Installation:
- Plug-and-play design requires no additional tuning
- Eliminates the risk of triggering check engine lights
-
Sturdy Build:
- 3.250in mandrel-bent 6061-T6 aluminum intake tubing for maximum durability
-
Effective Heat Management:
- Custom heat shield designed for precise application
-
Top-notch Filtration:
- Fully serviceable Injen SuperNano-Web dry air filter ensures lasting performance
-
Customizable Appearance:
- Available in various finishes to suit individual tastes
-
Distinctive Sound:
- Produces an aggressive engine tone under full throttle, enhancing the driving experience
-
Optimized Airflow:
- Streamlined intake piping eliminates restrictions, promoting improved airflow
-
American Craftsmanship:
- Crafted with pride in Pomona, California
-
Warranty Peace of Mind:
- Backed by Injen Technology Limited Lifetime Warranty
Important Note:
- Not CARB exempt; unavailable for purchase in California.
- Not suitable for use on vehicles registered with the California Department of Motor Vehicles.
