Perrin PSP-INT-355BK Afta-MAF Intake Tube for 2008-2021 Subaru WRX/STI/Legacy XT

Vehicle Fitment

• 2008-2014 Subaru Impreza WRX (2.0L Turbo, AWD)
• 2008-2021 Subaru WRX STI (2.5L Turbo, AWD)
• 2005-2009 Subaru Legacy GT & Outback XT (2.5L Turbo, AWD)

Features

• 5-ply smooth interior silicone Afta-MAF tube
• Oversized vs OEM corrugated hose for smoother airflow
• CNC-machined MAF sensor bung for precise alignment
• No ECU tuning required - fits stock airbox
• Improves turbo spool, throttle response, horsepower
• 35-45 % volume increase over OEM hose
• Resistant to cracking and brittle failure
• Included black finish adds engine bay clean look

Specifications

• Material: 5-ply reinforced silicone, heat-resistant
• Diameter & volume: larger than OEM (~3.0" vs ~2.4" ID)
• Compatibility: Turbocharged AWD EJ20/EJ25 engines
• Finish: Matte black silicone
• Clamps: 2 stainless steel worm clamps included

Included Components

• 1x Perrin Afta-MAF silicone intake tube (black)
• 2x stainless steel worm-type clamps
• 1x CNC MAF sensor adapter bung
• Instruction manual and warranty card

Product Description

The Perrin PSP-INT-355BK Afta-MAF intake tube is a high-quality OEM-style replacement for the factory corrugated hose in turbocharged Subaru WRX, STI, Legacy GT, and Outback XT models. Its smooth, 5-ply silicone construction increases airflow and turbo spool while eliminating weak and aging OEM hoses prone to cracking. And with no ECU tune needed, it's a direct, reliable upgrade for street and track use.

This durable intake hose includes a CNC-machined bung that ensures proper MAF sensor alignment, helping maintain accurate air-fuel ratios and avoiding check-engine lights. Installation takes approximately 10 minutes and fits the stock airbox and intake layout. Compatible with EJ20 and EJ25 engines (turbo AWD). Fitment confirmed through 2021; 2022+ unconfirmed at time of listing.