-10%
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
Click to zoom in

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
$ 350.64 $ 313.74
FREE Ground Shipping!
$ 313.74

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
Read More
Read Less

Request For Information

Have questions about ? Fill out the form below and we'll get back to you by the next business day.
Air Intake Systems

Air Intake Systems

Air Intake Systems, Cold Air Intakes & Performance Intake Parts Shop premium air intake systems, cold air intakes, short ram intakes, air boxes, intake components, intake elbows, mass air flow sensors, scoops, snorkels, recharge kits, silicone couplers, and intake hoses at Black Ops Auto Works. This collection is built for enthusiasts looking to improve airflow, throttle response, induction sound, horsepower potential, and under-hood performance across cars, trucks, SUVs, Jeeps, muscle cars, off-road builds, and supercharged HEMI platforms. Whether you are upgrading a daily driver, Dodge Charger, Dodge Challenger, Dodge Durango, Jeep Grand Cherokee, Jeep Trackhawk, Ram TRX, Ram RHO, Toyota Tundra, Chevy Silverado, Chevrolet Camaro, Corvette, BMW, Cadillac CTS-V, Honda, Hyundai, Infiniti, or a custom performance build, our Air Intake Systems collection includes parts designed for fitment, durability, and real-world performance. Air Intake Systems from Top Brands Shop trusted air ...

View Air Intake Systems Products
Cold Air Intakes

Cold Air Intakes

Shop All Air Intakes & Performance Intake Kits Premium cold air intakes, performance air intake systems, short ram intakes, carbon fiber intakes, sealed air box intakes, HEMI intakes, Hellcat intakes, Trackhawk intakes, TRX intakes, and vehicle-specific intake upgrades at Black Ops Auto Works. This collection is built for enthusiasts looking to improve airflow, throttle response, induction sound, horsepower potential, and under-hood styling. Whether you are upgrading a street car, muscle car, truck, SUV, Jeep, off-road build, diesel truck, or track-focused vehicle, our Cold Air Intakes collection includes high-quality intake systems designed for fitment, performance, and long-term reliability. Cold Air Intakes from Top Brands Shop trusted cold air intake and performance intake brands available in our catalog, including: Legmaker Intakes aFe Power JLT Performance K&N Engineering Airaid Corsa Performance Injen Technology Spectre Performance Wehrli Custom Fabrication   These ...

View Cold Air Intakes Products
Injen

Injen

At Black Ops Auto Works, we stock the complete lineup of Injen performance air intakes and exhaust systems dyno-proven for maximum horsepower, torque gains, and throttle response with a signature deep intake tone. Explore top-selling Injen Evolution sealed cold air intakes, SP Series polished intakes, SuperNano-Web dry filters, and cat-back exhausts featuring mandrel-bent tubing and high-flow mufflers for trucks, SUVs, muscle cars, and imports all CARB-approved where applicable with lifetime warranties. Injen Intake for Jeep Grand Cherokee – HEMI Power Unleashed Grand Cherokee owners choose the Injen Power-Flow cold air intake for increased airflow, cooler charge temps, and an aggressive engine sound on 5.7L V8 builds. Aluminum intake tube with massive filter Dyno-proven gains and improved throttle response Easy bolt-on with no tuning required Shop Popular Injen Intake for Jeep Grand Cherokee Injen Intake for Dodge Durango – V8 Muscle Upgrade Dodge Durango drivers upgrade to Inje...

View Injen Products
Military & First Responder Discounts

Military & First Responder Discount Program

Black Ops Auto Works proudly honors active duty military, veterans, National Guard, reserves, police officers, firefighters, and EMTs with an exclusive 5% discount on all performance parts and carbon fiber upgrades. Verify instantly and start saving today.

Learn More & Apply

Your cart

×