Injen SP1208P Short Ram Air Intake System Polished 2018-2021 Subaru WRX STI

The Injen SP1208P short ram air intake system delivers proven performance gains for 2018-2021 Subaru WRX STI models equipped with the H4-2.5L turbo engine. This polished aluminum intake system is the result of extensive research and development, engineered to replace the restrictive factory airbox and unlock your engine's full power potential with a simple bolt-on installation that requires no additional tuning.

Performance You Can Measure:

• Dyno-proven gains of up to 26 horsepower and 24 lb-ft of torque
• Maintains safe air/fuel ratios throughout the powerband
• No tuning required and no check engine lights
• Aggressive throttle response with enhanced engine sound

Advanced Engineering Features:

• 3.250-inch mandrel-bent 6061-T6 aluminum intake tubing for unrestricted airflow
• Features Injen's patented MegaRam (MR) Technology for maximum power gains
• Custom-designed heat shield to protect intake air temperatures
• Fully serviceable SuperNano-Web dry air filter with superior filtration and airflow
• Smooth internal tube design eliminates turbulence and restrictions

What's Included:

Complete intake system with polished aluminum tubing, SuperNano-Web dry air filter, custom heat shield, and all necessary mounting hardware for direct-fit installation. Replacement filter available as part number X-1059-BB. Optional Hydroshield protection available as part number 1040BLK.

Quality and Support:

Manufactured in Pomona, California using precision CNC-machined components. Backed by Injen Technology's Limited Lifetime Warranty. Also available in Wrinkle Black (SP1208WB) and Wrinkle Red (SP1208WR) finishes.

Important Notes:

This product is not CARB exempt and is not legal for sale or use in California or on vehicles registered with the California Department of Motor Vehicles. This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.