Injen SP1208P Polished Short Ram Intake for 2018–2021 Subaru WRX STI

The Injen SP1208P Short Ram Intake System in Polished finish is designed to deliver improved airflow, faster turbo response, and measurable power gains for the 2018–2021 Subaru WRX STI. Featuring Injen’s patented MegaRam (MR) Technology, this intake system produces dyno-proven gains while maintaining safe air-fuel ratios, all without requiring ECU tuning or causing check engine lights.

With its large 3.25-inch mandrel-bent 6061-T6 aluminum intake tubing, the SP1208P allows for smooth, unrestricted airflow to the turbo. A custom-designed heat shield helps reduce heat soak, while the included SuperNano-Web dry air filter offers excellent filtration and increased surface area. The result is improved performance, an enhanced induction sound, and a clean, high-quality look under the hood.

Like all SP Series systems, the SP1208P was engineered based on extensive R&D to ensure reliable gains and consistent performance. Manufactured in Pomona, California and backed by a Limited Lifetime Warranty, this intake is a dependable and stylish upgrade for STI enthusiasts.

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 of torque

• Short ram intake design for strong throttle response

• Patented MegaRam (MR) Technology ensures safe power gains

• No tuning required; maintains correct A/F ratios

• No check-engine light issues

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

• Polished finish for a clean, show-quality appearance

• Custom heat shield included

• Fully serviceable SuperNano-Web dry air filter

• Smooth intake piping reduces restrictions

• Produces a strong, aggressive induction tone

• Made in Pomona, California, USA

• Injen Limited Lifetime Warranty

• Finish options:

  • Polished: SP1208P

  • Wrinkle Black: SP1208WB

  • Wrinkle Red: SP1208WR

Technical Specs / Material Info

• Material: 6061-T6 aluminum

• Intake Type: Short Ram

• Filter Type: SuperNano-Web dry filter

• Heat Shield: Included

• Emissions: Not CARB exempt

• Legal Status: Not for sale or use in California

Installation Info

• Bolt-on installation

• No tuning required

• Uses OEM mounting points

• Install time: approximately 1 hour

• Includes all necessary hardware

Special Notes / Emissions Info

• Not CARB exempt

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

• Designed for WRX STI only