PERRIN PSP-INT-410BK 3in Turbo Inlet Hose for 2002-2007 Subaru WRX

Vehicle Fitment

• 2002-2007 Subaru Impreza WRX (All Trims, 2.0L H4 Turbo, AWD)
• 2004-2021 Subaru Impreza WRX STI (All Trims, 2.5L H4 Turbo, AWD)
• 2004-2013 Subaru Forester XT (All Trims, 2.5L H4 Turbo, AWD)

Fitment Notes

• Requires an aftermarket turbocharger with a 3-inch inlet - this hose WILL NOT fit the factory OEM turbocharger
• Compatible with any aftermarket intake system that works with the stock inlet hose routing
• Off-road/race use only - not street-legal in California; check all applicable local and federal laws prior to installation
• May require removal of the intake manifold for installation depending on vehicle year and turbo configuration
• Some vacuum line routing modifications may be required based on existing engine bay modifications
• No ECU tune required for baseline installation; additional power gains are achievable with proper ECU calibration

Features

• Specifically engineered for aftermarket turbocharger upgrades with 3-inch inlets - the only bolt-in solution that eliminates the need to fabricate a custom intake system
• Multi-layer, heat-resistant 5-ply silicone construction provides long-term durability and resistance to engine bay heat soak
• Smooth interior walls eliminate OEM corrugation and pleating, reducing turbulence and maximizing airflow velocity to the turbocharger
• Stainless steel support wire embedded within silicone layers adds rigidity and prevents hose collapse under extreme boost or with restrictive filter elements
• Machined aluminum blow-off valve insert bonded directly into silicone provides a solid, rattle-free BOV hose connection
• All spigots feature a 1/2" ID bore for maximum flow from crankcase vents and vacuum connections
• Glass-filled reinforced nylon couplers rated to 400°F withstand sustained engine bay temperatures under racing conditions
• Significantly larger internal diameter than OEM hose reduces turbo spool time, improves throttle response, and increases horsepower output
• Compatible with any aftermarket intake system designed to work with the stock inlet hose routing
• 5-Year manufacturer warranty from PERRIN Performance

Specifications

• Inner Diameter: 3 inches
• Hose Material: Multi-layer heat-resistant silicone (5-ply construction)
• Color: Gloss Black
• Internal Reinforcement: Stainless steel support wire
• Coupler Material: Glass-filled reinforced nylon, rated to 400°F
• BOV Insert Material: Machined aluminum (bonded into silicone)
• Spigot Inner Diameter: 1/2" ID (all ports)
• Position: Turbo inlet (between aftermarket 3" inlet turbocharger and intake system)
• Drivetrain: AWD
• Emissions: Off-road/race use only - not street-legal in California
• Warranty: 5-Year Manufacturer Warranty

Included Components

• 1x PERRIN PSP-INT-410BK 3-Inch Silicone Turbo Inlet Hose (Black)
• 3x Polished Couplers
• 1x 1/2" Fuel Hose
• All necessary installation hardware
• Installation Instructions
• PERRIN Stickers
• 1x PERRIN License Plate Frame

Product Description

The PERRIN PSP-INT-410BK is a 3-inch silicone turbo inlet hose purpose-built for 2002-2007 Subaru WRX, 2004-2021 WRX STI, and 2004-2013 Forester XT builds running aftermarket turbochargers with 3-inch inlets. Unlike the PSP-INT-401 series designed for factory turbos, this hose is the only plug-and-play solution on the market that accommodates a 3-inch turbo inlet without requiring a fully custom-fabricated intake path. The smooth, pleat-free interior and significantly enlarged bore work together to eliminate airflow turbulence and restriction, delivering more horsepower, faster turbo spool, and sharper throttle response - all from a single inlet hose swap.

Construction quality is built for high-output applications. The 5-ply heat-resistant silicone body is reinforced with an embedded stainless steel support wire that prevents collapse even under the most restrictive filter setups or at extreme boost levels. A machined aluminum insert bonded into the silicone provides a secure, leak-free blow-off valve connection, while all 1/2" ID vacuum and crankcase vent spigots maximize auxiliary flow. Three polished couplers and glass-filled nylon fittings (rated to 400°F) are included to handle the connection points between the inlet hose and intake system with a clean, professional finish.

This kit is designed for performance enthusiasts and builders who have already upgraded or plan to upgrade to an aftermarket 3-inch inlet turbocharger on their EJ-platform Subaru. It is not compatible with the factory stock turbo and is intended for off-road or race use only - it is not street-legal in California. Installation may require intake manifold removal depending on the specific turbo setup and engine bay configuration, and minor vacuum line routing adjustments may be needed. All necessary hardware is included in the kit, and no ECU tune is required for installation, though tuning is recommended to maximize power gains from the full intake and turbo combination.