Injen SP1208WR Short Ram Intake for 2018-21 Subaru WRX STI 2.5L Turbo

Vehicle Fitment

• 2018-2021 Subaru WRX STI (H4-2.5L Turbo)

Features

• Direct-fit SP Series short ram cold air intake system in wrinkle red finish
• Patented MegaRam (MR) Technology for optimized power gains without tuning
• Mandrel-bent 6061-T6 aluminum intake tube for smooth, high-flow airflow
• Large 3.25" tube diameter to maximize airflow into the turbo system
• Custom heat shield designed for the WRX STI engine bay
• Fully serviceable SuperNano-Web dry air filter with expansive surface area
• Produces aggressive induction sound under throttle
• Limited lifetime warranty from Injen Technology

Specifications

• Part Number: SP1208WR
• Type: SP Series short ram cold air intake
• Material: Mandrel-bent 6061-T6 aluminum
• Tube Diameter: ~3.25"
• Filter Type: SuperNano-Web dry air filter
• Replacement Filter: X-1059-BB
• Finish: Wrinkle red
• Engine Fitment: H4-2.5L Turbo
• Direct-Fit: Yes - specific to 2018-2021 WRX STI
• CARB Status: Not CARB exempt - restricted in some states

Included Components

• 1x Wrinkle red mandrel-bent intake tube
• 1x Custom heat shield
• 1x SuperNano-Web dry air filter
• 1x Mounting hardware kit
• 1x Installation instructions

Product Description

The Injen SP1208WR SP Series Short Ram Cold Air Intake is a direct-fit performance upgrade engineered specifically for 2018-2021 Subaru WRX STI models equipped with the 2.5 L turbocharged four-cylinder engine. Designed to replace the restrictive factory airbox, this intake uses patented MegaRam (MR) Technology and smooth mandrel-bent aluminum tubing to improve airflow into the engine, helping enhance throttle response and deliver dyno-proven gains without requiring additional ECU tuning. Dyno results suggest improvements of up to approximately 26 hp and 24 lb-ft of torque on compatible WRX STI applications.

Finished in a bold wrinkle red, the SP1208WR also includes a custom heat shield and a high-flow, fully serviceable SuperNano-Web dry air filter that provides excellent filtration and airflow. Installation is straightforward with the included hardware and instructions, and the system produces a more aggressive induction sound under acceleration. Backed by Injen Technology's limited lifetime warranty, this intake is ideal for STI enthusiasts seeking improved airflow, throttle response, and engine character - though it is not currently CARB exempt and may be restricted in some states.