PERRIN PSP-INT-421BL Blue Turbo Inlet Hose for 05-14 WRX/Legacy/Forester X

Vehicle Fitment

• 2008-2014 Subaru WRX (Turbo AWD)
• 2005-2009 Subaru Legacy GT / Outback XT (Turbo AWD)
• 2009-2012 Subaru Forester XT (Turbo AWD)

Features

• High-flow turbo inlet hose to replace restrictive OEM hose
• 2.4" smooth interior diameter for improved airflow
• Reinforced multi-layer silicone construction for durability
• Embedded stainless steel support wire prevents collapse under boost
• Glass-filled reinforced nylon coupler for smooth transitions
• Improves throttle response and turbo spool characteristics
• Direct replacement-style fit - no cutting required
• Blue finish adds visual engine bay appeal

Specifications

• Part Number: PSP-INT-421BL
• Type: Turbo inlet hose / turbo inlet pipe
• Material: High-temp silicone with stainless steel support
• Inner Diameter: 2.4" smooth-bore design
• Connectors: Includes glass-reinforced nylon coupler
• Includes vacuum and crankcase vent fittings
• Direct OEM-style replacement design
• Finish: Blue silicone

Included Components

• 1x PERRIN blue turbo inlet hose (PSP-INT-421BL)
• 1x Glass-filled nylon coupler
• 1x Diagnostic connector
• 1x 48 clamp, 1x 36 clamp, 1x 6 clamp
• 2x 1/2"-to-1/2" 90° connectors
• 2x 1/2"-to-3/8" 90° connectors
• 1x M8 hex head bolt
• PERRIN license plate frame, warranty & instructions

Product Description

The PERRIN PSP-INT-421BL Blue Turbo Inlet Hose is a performance-focused upgrade designed to replace the OEM corrugated turbo inlet hose on select Subaru turbocharged vehicles. Its smooth-bore 2.4" silicone design eliminates restrictive factory pleats, allowing for increased airflow into the turbocharger which can lead to improved throttle response, reduced turbo lag, and modest power gains. The hose's multi-layer reinforced construction with embedded stainless steel wire adds durability and prevents collapse under high-boost conditions.

A direct replacement for the stock turbo inlet hose on vehicles such as the 2008-2014 WRX, 2005-2009 Legacy GT/Outback XT, and 2009-2012 Forester XT, this PERRIN inlet is simple to install with the included heavy-duty coupler, clamps, and fittings. The blue finish not only stands out visually but also resists heat and engine bay wear, making it a popular choice for enthusiasts seeking both performance and reliability without the need for ECU tuning on stock vehicles.