Perrin Turbo Inlet Hose Blue 2002-2007 WRX / 2004-2021 STI / 2004-2008 Forester XT | Increased Airflow | Performance Turbo Inlet Hose
Overview
The Perrin Turbo Inlet Hose is a direct replacement for the restrictive OEM turbo inlet hose found on select Subaru WRX, WRX STI, and Forester XT models. Designed to improve airflow into the turbocharger, this high-quality silicone hose enhances horsepower, reduces turbo lag, and sharpens throttle response without requiring any ECU tuning. It’s an ideal upgrade for Subaru enthusiasts looking to extract more performance from their turbocharged engines while maintaining reliability and OEM-style fitment.
Engineered with a smooth internal bore and a larger diameter than the factory hose, the Perrin inlet hose eliminates the pleats that cause airflow turbulence and restriction. Reinforced with a stainless steel support wire embedded within the silicone layers, this hose resists collapse under high boost pressures and maintains its shape even with restrictive air filters or larger turbo setups. The inclusion of a glass-filled nylon coupler and a machined aluminum blow-off valve connection further demonstrate Perrin’s commitment to durability and precision engineering.
For Subaru owners, this turbo inlet hose translates to tangible gains in power delivery and responsiveness, making daily driving more engaging and spirited. The plug-and-play crankcase vent connector preserves emissions compliance without modification, ensuring a seamless upgrade experience. Whether you’re running a stock tune or planning future ECU calibration, the Perrin Turbo Inlet Hose is a smart, reliable performance enhancement that complements Subaru’s turbocharged platforms.
Features & Specifications
This Perrin Turbo Inlet Hose is engineered for 2002-2007 WRX, 2004-2021 WRX STI, and 2004-2008 Forester XT models and features a smooth, larger internal diameter silicone construction with stainless steel reinforcement. Constructed from high-grade silicone and glass-filled nylon, it delivers improved airflow and durability for Subaru enthusiasts seeking enhanced turbo response and horsepower gains.
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Brand: Perrin Performance
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Product: Turbo Inlet Hose Blue 2002-2007 WRX / 2004-2021 STI / 2004-2008 Forester XT
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Part Number: PSP-INT-401BL
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Fitment: 2002-2007 Subaru WRX, 2004-2021 Subaru WRX STI, 2004-2008 Subaru Forester XT
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Material: Silicone with stainless steel support wire, glass-filled nylon coupler
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Finish: Blue silicone
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Construction: Reinforced layered silicone with embedded stainless steel wire, machined aluminum blow-off valve insert
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Origin: USA (Perrin Performance)
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Tuning Required: No (tuning recommended for additional gains)
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Blow Off Valve Connection: Machined aluminum insert bonded into silicone layers
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Crank Case Vent Connector: OEM-style plug-and-play design
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Spigot Size: 1/2" ID glass reinforced nylon connectors
Key Benefits
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Performance: Increases horsepower and torque by improving turbocharger airflow and reducing spool time.
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Durability: Stainless steel reinforcement prevents hose collapse under high boost and extreme conditions.
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Fitment: Direct bolt-on replacement with OEM-style crankcase vent connector preserves emissions compliance.
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Quality: High-grade silicone and glass-filled nylon components ensure long-lasting performance and heat resistance.
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Throttle Response: Smooth internal bore eliminates pleats, enhancing acceleration and responsiveness.
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Ease of Installation: Includes all necessary clamps, connectors, and vacuum hoses for a complete upgrade.
What's Included
- 1× Perrin Turbo Inlet Hose Blue (PSP-INT-401BL)
- 1× Glass-filled nylon coupler
- 1× Diagnosis connector
- 1× 15" vacuum hose
- 1× 48 clamp
- 1× 36 clamp
- 2× 6 clamps
- 2× 1/2"-1/2" 90 degree connectors
- 2× 1/2"-3/8" 90 degree connectors
- 1× Perrin license plate frame
- Installation instructions
Installation & Compatibility
The Perrin Turbo Inlet Hose is designed for straightforward installation with basic hand tools, making it a DIY-friendly upgrade for most Subaru enthusiasts. The kit includes all necessary clamps, connectors, and vacuum hoses to ensure a complete and secure fit. No special modifications or cutting are required, and the OEM-style crankcase vent connector maintains emissions system integrity. While no ECU tuning is required to realize power gains, additional tuning can unlock further performance potential.
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Professional Installation: Recommended for those unfamiliar with turbo system components
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Modifications Required: None
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Verify Compatibility: Confirm fitment for your specific year and trim level of WRX, WRX STI, or Forester XT
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