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Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished Injen INJSP1208P
Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished Injen INJSP1208P
Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished Injen INJSP1208P
Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished Injen INJSP1208P
Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished Injen INJSP1208P
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Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished

Injen
INJSP1208P
843115029739
Cold Air Intakes
2 Units In Stock - Ships Next Business Day
$ 378.69 $ 338.83
FREE Ground Shipping!
$ 338.83

SKU: 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 Features

  • Mandrel-Bent 6061-T6 Aluminum Tubing: TIG-welded polished pipes create smooth unrestricted airflow paths for immediate throttle response and power.
  • SuperNano-Web Dry Air Filter: Fully serviceable design with expanded surface area delivers high airflow volume and traps more contaminants without oil.
  • Dyno-Tested Performance Gains: Adds 12 HP and 13 lb-ft torque on 2018-2021 WRX STI, verified by Injen dyno charts for real-world results.
  • Aggressive Intake Sound: Produces deep throaty roar under acceleration, enhancing Subaru WRX STI driving experience without drone.
  • Complete Bolt-On Kit: Includes couplers, clamps, and MAF adapter for straightforward replacement of factory intake system.

Product Notes

  • SuperNano-Web filter cleans with water and air dries for repeated use without performance loss.
  • Polished aluminum finish resists corrosion and adds underhood style.
  • Kit weighs 9 lbs for lightweight power addition over OEM components.

Installation Notes

  • Professional installation recommended.
  • Bolt-on fit takes 1-2 hours with basic hand tools, no vehicle modifications needed.
  • Retains OEM mass airflow sensor position and heat shield compatibility.

This Part Fits

Year Make Model Submodel
2018-2021 Subaru WRX STI Base
2018-2021 Subaru WRX STI Limited
2020 Subaru WRX STI S209
2018 Subaru WRX STI Type RA

Why Choose Injen?

  • 25+ years engineering high-flow intake systems for turbo Subarus.
  • Precision CAD-designed for exact WRX STI engine bay fitment.
  • Limited Lifetime Warranty covers intake tubing and SuperNano-Web filter.

Frequently Asked Questions

  • Q: Does SP1208P fit 2020 Subaru WRX STI S209 or 2018 Type RA?
    A: Yes, confirmed direct fit for 2018 Type RA, 2018-2021 Base/Limited, and 2020 S209 models with H4 2.5L turbo.
  • Q: What material and filter type does this intake use?
    A: TIG-welded 6061-T6 polished aluminum tubing pairs with oil-free SuperNano-Web dry filter for easy maintenance.
  • Q: What warranty and power gains come with SP1208P?
    A: Injen limited Lifetime Warranty applies, with dyno-tested gains of 12 HP and 13 lb-ft torque on WRX STI.

Shipping & Handling

  • Method: UPS Ground or FedEx Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Secure Injen box measuring 28 x 16 x 14 inches
  • Weight: 9 lbs

Request For Information

Have questions about Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished? Fill out the form below and we'll get back to you by the next business day.
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