Perrin Turbo Inlet Hose Special 3" Fitment - Subaru STI (2004-2021)

The PERRIN Turbo Inlet Hose features a smooth interior and a larger diameter than the OEM hose. Removing the restrictive OEM pleats increases airflow, helping produce more horsepower, reduce turbo spool time, and improve throttle response.

• Designed for 2002–2007 Subaru WRX, STI, and Forester XT applications
• Special 3-inch fitment for upgraded turbochargers
• No ECU recalibration or tuning required
• Stainless-steel support wire prevents hose collapse
• Machined-aluminum blow-off valve connection
• Large, high-flow 1/2-inch ID spigots
• Estimated DIY installation time: 120 minutes

Smoother Airflow

The PERRIN Inlet Hose is completely smooth on the inside and has a significantly larger internal diameter than the OEM component. Removing the pleats found in the factory hose improves airflow, increases horsepower, decreases turbo spool time, and improves acceleration.

No Tuning Required

Increase horsepower and torque without an ECU recalibration or tune. This component is designed and tested to operate safely without tuning. Additional power may be achieved with proper ECU tuning. Always confirm that any tune or recalibration is compatible with every modification installed on the vehicle.

Designed for Large 3-Inch Turbos

The PERRIN Performance 3-inch Turbo Inlet Hose is specifically designed for turbocharger upgrades featuring 3-inch inlets. It eliminates the need to construct a custom intake system and is compatible with replacement intake systems designed to work with the stock inlet hose.

Stainless-Steel Support Wire

A stainless-steel support wire embedded within the silicone layers reinforces the PERRIN Inlet Hose. This added rigidity helps prevent the hose from collapsing when used with restrictive filter elements or large-turbo applications running extreme boost levels.

Blow-Off Valve Connection

A machined-aluminum insert is bonded into the silicone layers, creating a secure blow-off valve hose connection and helping simplify installation.

Large High-Flow Spigots

All spigots on the PERRIN Inlet Hose feature a 1/2-inch inside diameter for maximum flow from crankcase vents and other vacuum connections. The connectors are constructed from glass-reinforced nylon rated to 400°F, allowing them to withstand engine-bay temperatures ranging from normal driving to extreme racing conditions.

Product Details

• SKU: PSP-INT-410BK
• Turbo inlet size: 3 inches
• Estimated installation time: 120 minutes
• Technical assistance: tech@perrin.com

Off-Road Use Only

This product is legal in California only for racing vehicles that may never be used upon a highway. Check all applicable local, state, and federal laws before installation or use.

California Proposition 65 Warning

WARNING: Handling passenger or off-highway motor-vehicle parts can expose you to chemicals such as phthalates and lead, which can cause cancer and reproductive harm. To minimize exposure, service the vehicle in a well-ventilated area, wear gloves, and wash your hands afterward.

For more information, visit P65Warnings.ca.gov/motor-vehicle-parts .