PERRIN PSP-INT-401BL Blue Turbo Inlet Hose for 02-21 WRX/STI/Forester XT

Vehicle Fitment

• 2002-2007 Subaru Impreza WRX (Turbo AWD)
• 2004-2021 Subaru WRX STI (Turbo AWD)
• 2004-2008 Subaru Forester XT (Turbo AWD)

Features

• High-flow turbo inlet hose replaces restrictive OEM corrugated design
• 5-layer reinforced silicone construction for durability and heat resistance
• Stainless steel support wire embedded to prevent collapse under boost
• Smooth internal bore improves airflow and throttle response
• Larger 2.4" internal diameter increases turbocharger efficiency
• Blue finish adds visual appeal to engine bay
• Includes fittings and clamps for direct installation
• Direct fit - no cutting or welding required

Specifications

• Part Number: PSP-INT-401BL
• Type: Turbo inlet hose / turbo inlet pipe
• Material: Multi-layer reinforced silicone
• Inner Diameter: 2.4 inches
• Support: Embedded stainless steel wire
• Finish: Blue silicone
• Includes: Nylon coupler and vacuum fittings
• Direct replacement for stock inlet hose

Included Components

• 1x Turbo inlet hose (blue silicone)
• 1x Nylon coupler
• 1x Diagnosis connector
• 1x 15" vacuum hose
• 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
• PERRIN license plate frame
• Installation instructions & warranty info

Product Description

The PERRIN PSP-INT-401BL Turbo Inlet Hose is a performance-oriented replacement for the factory turbo inlet hose on turbocharged Subaru platforms. Designed to eliminate the restrictive accordion-style hose that often fails with age, this reinforced silicone inlet hose features a smooth internal surface and a larger 2.4" diameter that promotes freer airflow into the turbocharger, reducing turbo lag and improving throttle response under boost.

Built with a multi-layer silicone construction and embedded stainless steel support wire, the PSP-INT-401BL is more durable than the OEM hose and resists collapse under high boost pressures. The included fittings and clamps provide a direct bolt-on installation, and the vibrant blue finish enhances engine bay aesthetics. This upgrade is ideal for enthusiasts looking to improve response and airflow on older WRX, STI, and Forester XT models while retaining emissions-compatible fitment.