Injen SP1208WR Wrinkle Red Short Ram Intake for 2018–2021 Subaru WRX STI

The Injen SP1208WR Short Ram Intake System in Wrinkle Red is engineered to deliver strong performance gains for the 2018–2021 Subaru WRX STI. Built around Injen’s patented MegaRam (MR) Technology, this intake is designed to provide increased airflow, improved throttle response, and dyno-proven horsepower and torque gains without requiring any additional tuning or triggering check-engine lights.

The system features large 3.25-inch mandrel-bent 6061-T6 aluminum tubing for smooth, unrestricted airflow. A custom heat shield isolates the filter from engine bay heat, and the fully serviceable SuperNano-Web dry air filter offers excellent filtration and maximum surface area for improved airflow. The SP1208WR also produces an aggressive induction sound under throttle, giving your STI the response and character it deserves.

The SP Series is Injen’s flagship intake line, known for precision tuning, patented intake technologies, and high-quality construction. Made in Pomona, California, this intake is backed by Injen’s Limited Lifetime Warranty.

Key Features and Benefits

• Direct fit for 2018–2021 Subaru WRX STI H4-2.5L Turbo

• Dyno-proven gains of up to 26 hp and 24 lb-ft torque

• Short ram intake design for fast turbo response

• Patented MegaRam (MR) Technology for safe, reliable power gains

• Maintains proper A/F ratios without requiring tuning

• No CEL issues

• Large 3.25-inch mandrel-bent 6061-T6 aluminum intake tubing

• Includes custom heat shield for reduced heat soak

• Fully serviceable Injen SuperNano-Web dry air filter

• Produces aggressive induction tone under throttle

• Improved airflow and reduced restriction

• Made in the USA (Pomona, California)

• Limited Lifetime Warranty

• Finish options:

  • Polished: SP1208P

  • Wrinkle Black: SP1208WB

  • Wrinkle Red: SP1208WR

Technical Specs / Material Info

• Intake Material: 6061-T6 aluminum

• Filter Type: SuperNano-Web dry filter

• Intake Type: Short Ram

• Heat Shield: Included

• Emissions: Not CARB exempt

• Legal Status: Not for use in California

Installation Info

• Direct bolt-on installation

• No ECU tuning required

• Install typically takes 1 hour

• All necessary hardware included

• Uses OEM mounting points

Special Notes / Emissions Info

• Not CARB exempt

• Not legal for use in California or CARB-regulated states

• Fits STI only, not WRX