Torque Solution TS-SU-009 4ply Silicone Post-MAF Hose WRX 08-14/STI 08-21/Legacy

Vehicle Fitment

• 2008-2014 Subaru Impreza WRX (2.5L EJ255 H4 Turbo, AWD) - Sedan and Hatchback
• 2008-2021 Subaru Impreza WRX STI (2.5L EJ257 H4 Turbo, AWD) - Sedan and Hatchback
• 2005-2009 Subaru Legacy GT (2.5L EJ255 H4 Turbo, AWD)
• 2005-2009 Subaru Outback XT (2.5L EJ255 H4 Turbo, AWD)

Fitment Notes

• Replaces the factory corrugated rubber post-MAF hose between the MAF sensor and turbo inlet
• Fits all body styles and trim levels for all listed model years
• For 2002-2007 WRX/STI post-MAF hose see PN TS-SU-008
• Direct OEM replacement - no modifications required; installs in under 15 minutes
• Black finish only

Features

• Smooth interior bore eliminates air turbulence caused by the OEM corrugated hose design, improving airflow into the turbo inlet
• 4-ply silicone construction resists pressure expansion, heat, and degradation - outlasts OEM rubber under sustained boost and temperature cycles
• Street and track torture tested for reliability under all driving conditions
• Installs in under 15 minutes with standard hand tools
• Made in the USA by Torque Solution; Limited Lifetime Warranty

Specifications

• Part Type: Post-MAF Silicone Intake Hose (Direct OEM Replacement)
• Material: 4-Ply Silicone
• Color: Black
• Compatible Engines: EJ255 2.5L H4 Turbo, EJ257 2.5L H4 Turbo
• Position: Post-MAF (between MAF sensor and turbo inlet)
• Drivetrain: AWD
• Install Time: Under 15 minutes

Included Components

• 1x 4-Ply Silicone Post-MAF Intake Hose (Black)

Product Description

The Torque Solution TS-SU-009 is a 4-ply silicone post-MAF intake hose covering the 2008-2014 Subaru WRX, 2008-2021 Subaru STI, 2005-2009 Legacy GT, and 2005-2009 Outback XT. The factory corrugated rubber hose creates turbulence in the airstream between the MAF sensor and the turbo inlet - disrupting airflow efficiency and reducing the volume of charge air reaching the turbocharger. The TS-SU-009's smooth silicone bore eliminates that turbulence, delivering cleaner, more consistent airflow to the turbo inlet and allowing the engine to produce more power from the same air volume.

Built from 4-ply silicone specifically engineered for this application, this hose resists the pressure expansion, heat soak, and long-term cracking that commonly affect the OEM rubber hose - particularly on modified EJ255 and EJ257 builds running elevated boost. Installation is a direct swap requiring no modifications and takes under 15 minutes. For 2002-2007 WRX and STI applications, see the companion PN TS-SU-008. Backed by Torque Solution's Limited Lifetime Warranty and made in the USA.