Injen SP1208WB Wrinkle Black Short Ram Intake for 2018–2021 Subaru WRX STI

The Injen SP1208WB Short Ram Intake System in Wrinkle Black is designed to improve power, throttle response, and airflow efficiency for the 2018–2021 Subaru WRX STI. Built with Injen’s patented MegaRam (MR) Technology, this intake provides dyno-verified gains without requiring additional tuning or causing check engine lights.

Constructed from large 3.25-inch mandrel-bent 6061-T6 aluminum tubing, the SP1208WB offers a smooth and direct airflow path that enhances turbo performance. The system includes a custom application-specific heat shield to reduce heat soak and utilizes Injen’s SuperNano-Web dry air filter, which delivers excellent filtration and airflow capacity.

As part of Injen’s flagship SP Series, this intake incorporates multiple patented tuning innovations, ensuring reliable and safe power gains. It also produces an aggressive induction sound under throttle, giving your STI a sharper, more responsive feel. Made in Pomona, California and backed by a Limited Lifetime Warranty, this intake is a proven and durable performance upgrade.

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 rapid turbo response

• Patented MegaRam (MR) Technology for controlled A/F ratios

• No tuning required and no check-engine light issues

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

• Wrinkle black finish for a sleek, performance-oriented look

• Custom heat shield included

• Fully serviceable SuperNano-Web dry air filter

• Smooth intake piping reduces restriction for improved airflow

• Aggressive induction tone under throttle

• Made in Pomona, California, USA

• 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

• Not legal for sale or use in California

Installation Info

• Direct bolt-on installation

• No ECU tuning required

• Uses factory mounting points

• Install time: approximately 1 hour

• All required hardware included

Special Notes / Emissions Info

• Not CARB exempt

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

• Fits STI only, not WRX