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Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Red Injen INJSP1208WR
Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Red Injen INJSP1208WR
Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Red Injen INJSP1208WR
Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Red Injen INJSP1208WR
Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Red Injen INJSP1208WR
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Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Red

Injen
INJSP1208WR
843115029746
Cold Air Intakes
11 Units In Stock - Ships Next Business Day
$ 378.69 $ 338.83
FREE Ground Shipping!
$ 338.83

SKU: SP1208WR | UPC: 843115029746

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

This Injen SP Series cold air intake system upgrades 2018-2021 Subaru WRX STI models with a mandrel-bent 6061-T6 aluminum tube in wrinkle red finish for maximum airflow and dyno-proven gains up to 14 HP and 15 lb-ft torque. It fits Base, Limited, S209, and Type RA submodels with bolt-on installation that replaces stock airbox. Drivers gain responsive throttle and throaty intake sound under boost.

Key Features

  • Mandrel-Bent Aluminum Tubing: 3-inch diameter 6061-T6 aluminum pipe with wrinkle red powder coat ensures smooth unrestricted airflow and durable corrosion resistance.
  • SuperNano-Web Dry Filter: Fully serviceable 8.5-inch base x 7.5-inch top x 3.25-inch height filter traps dirt with 99.43% efficiency while allowing 45% more airflow than OEM.
  • Aggressive Intake Sound: Tuned design produces deep throaty roar at idle and under acceleration for audible performance feedback.
  • Complete Bolt-On Kit: Includes silicone couplers, stainless clamps, and CNC-machined MAF sensor flange for direct factory replacement without cutting or permanent mods.
  • Lifetime Warranty: Backed by Injen Technology limited lifetime warranty covering defects in materials and workmanship.

Product Notes

  • Filter is oil-free and washable for easy maintenance every 50,000 miles.
  • Replaceable filter part number SP1707RB available separately.
  • Free-flowing design works with stock tune, no ECU flash required.

Installation Notes

  • Professional installation recommended.
  • Bolt-on fit takes 1-2 hours with basic hand tools. remove stock airbox and intake tube.
  • All necessary hardware and O-ring seals included for secure mounting.

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?

  • Injen pioneered sealed cold air intakes with patented MR Technology since 1996.
  • Every intake dyno-tested for real-world power and torque increases.
  • Precision TIG-welded construction and premium materials built for track and street.

Frequently Asked Questions

  • Q: Does this fit 2018-2021 Subaru WRX STI with factory turbo?
    A: Yes, direct bolt-on for all listed 2018-2021 WRX STI Base, Limited, 2020 S209, and 2018 Type RA models with H4-2.5L EJ257 turbo engine.
  • Q: What material and finish does the SP1208WR use?
    A: 6061-T6 aluminum tubing with heat-resistant wrinkle red powder coat finish for style and protection against underhood temperatures.
  • Q: What warranty covers this intake?
    A: Injen Technology limited lifetime warranty protects against manufacturing defects when installed and maintained per instructions.

Shipping & Handling

  • Method: Free ground shipping on orders over $49
  • Availability: In stock - ships same or next business day
  • Packaging: Securely boxed at 28 x 15 x 13.5 inches
  • Weight: 10.3 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 Red? Fill out the form below and we'll get back to you by the next business day.
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