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Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Black Injen INJSP1208WB
Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Black Injen INJSP1208WB
Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Black Injen INJSP1208WB
Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Black Injen INJSP1208WB
Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Black Injen INJSP1208WB
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Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Black

Injen
INJSP1208WB
843115029753
Cold Air Intakes
6 Units In Stock - Ships Next Business Day
$ 378.69 $ 338.83
FREE Ground Shipping!
$ 338.83

SKU: SP1208WB | UPC: 843115029753

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

The Injen SP1208WB SP Series cold air intake system delivers dyno-proven power gains for 2018-2021 Subaru WRX STI models with H4-2.5L turbo engines. This aluminum intake replaces the restrictive factory airbox to feed cooler, denser air into the engine for sharper throttle response and increased horsepower and torque. Engineered with patented tuning processes, it fits 2018-2021 WRX STI Base and Limited, 2020 S209, and 2018 Type RA submodels.

Key Features

  • MegaRam (MR) Technology (Patents 7,359,795 and 7,669,571): Enlarged intake runners increase air charge volume and velocity for enhanced mid-range torque and power delivery.
  • Air Fusion Technology (Patent 7,721,669): Seamless integration between the intake tube and oversized air filter creates laminar airflow with zero turbulence for maximum efficiency.
  • 6061-T6 Aluminum Tubing: Mandrel-bent pipes with wrinkle black powder coat finish provide lightweight strength, corrosion resistance, and a durable aggressive look under the hood.
  • SuperNano™ Dry Air Filter: High-flow synthetic media captures contaminants without oil, allows easy cleaning, and maintains peak performance over time.
  • Dyno-Proven Gains: Delivers up to +18 HP at 5200 RPM and +17 lb-ft torque at 4300 RPM over stock intake configuration.

Product Notes

  • Bolt-on design requires no ECU tuning or engine modifications for immediate gains.
  • MPN SP1208WB includes all necessary silicone couplers, clamps, and hardware.
  • Special order item with limited stock, confirm availability before purchase.

Installation Notes

  • Professional installation recommended.
  • Complete installation takes 60-90 minutes with basic hand tools.
  • All mounting points use factory locations, no drilling or cutting required.

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?

  • First company to develop tuned air intake systems with four intake tuning patents.
  • Decades of engineering experience in the performance aftermarket industry.
  • Every system undergoes rigorous dyno testing for real-world power increases.

Frequently Asked Questions

  • Q: Will SP1208WB fit my 2021 Subaru WRX STI Base model?
    A: Yes, it fits all 2018-2021 WRX STI Base, Limited, plus 2020 S209 and 2018 Type RA with H4-2.5L turbo engines.
  • Q: What material and finish does the intake use?
    A: TIG-welded 6061-T6 aluminum tubing with wrinkle black powder coat for heat resistance and long-lasting appearance.
  • Q: What is the warranty on this cold air intake?
    A: Lifetime warranty on structural components, one-year warranty on the SuperNano air filter with proper maintenance.

Shipping & Handling

  • Method: UPS Ground or FedEx Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Secure foam-protected box measuring 36" L x 14" W x 12" H
  • Weight: 8.5 lbs net weight, 12 lbs shipping weight

Request For Information

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