Perrin Front Mount Intercooler Boost Tubes Red w/ Black Silicone Couplers 2018-2021 STI | 2.25" Aluminum Tubing | Boost Tubes
Overview
The Perrin Front Mount Intercooler Boost Tubes are precision-engineered components designed specifically for the 2015-2021 Subaru WRX STI. These boost tubes replace the restrictive factory piping with smooth, CNC mandrel bent aluminum tubing, providing an optimized airflow path between the turbocharger and the intercooler. Ideal for STI owners aiming to improve boost response and support increased horsepower, this kit ensures a reliable, obstruction-free route for the charged air, enhancing overall turbo efficiency.
Built with a focus on engineering excellence, Perrin’s boost tubes feature 2.25-inch diameter tubing with oversized beaded ends that secure the included black silicone couplers and hose clamps firmly in place. This design minimizes turbulence and pressure drop, critical factors for maintaining consistent boost pressure under demanding driving conditions. The red powder-coated aluminum tubing not only adds durability but also a clean, purposeful look under the hood.
For Subaru enthusiasts, this upgrade translates to sharper throttle response and more efficient turbo operation, especially when combined with supporting modifications and proper ECU tuning. The routing is carefully designed to clear turbo and intake components, ensuring compatibility with various setups and simplifying installation. Note that the intercooler core is sold separately, allowing you to tailor your cooling system to your performance goals.
Features & Specifications
This Perrin Performance boost tube kit is engineered for 2015-2021 Subaru WRX STI models and features 2.25-inch CNC mandrel bent aluminum tubing with black silicone couplers. Constructed from lightweight aluminum, it delivers improved airflow and durability for Subaru enthusiasts seeking enhanced boost efficiency and power support.
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Brand: Perrin Performance
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Product: Front Mount Intercooler Boost Tubes Red w/ Black Silicone Couplers 2018-2021 STI
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Part Number: PSP-ITR-439-2RD/BK
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Fitment: 2015-2021 Subaru WRX STI
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Material: Aluminum
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Finish: Red powder coat tubing with black silicone couplers
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Construction: CNC mandrel bent tubing with oversized beaded ends
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Origin: Made in USA
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Tube Diameter: 2.25 inches
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Design: Smooth, shortest path routing for optimal airflow
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Core Included: No, intercooler core sold separately
Key Benefits
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Performance: Larger 2.25" tubing reduces airflow restrictions, supporting higher horsepower and improved boost response.
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Durability: CNC mandrel bent aluminum tubing resists cracking and deformation under heat and pressure.
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Fitment: Engine bay routing clears turbo and intake components, ensuring compatibility with various setups.
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Quality: Oversized beaded ends and high-quality silicone couplers provide secure, leak-free connections.
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Weight Savings: Aluminum construction reduces weight compared to factory piping, contributing to overall vehicle efficiency.
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Serviceability: Modular design allows easy removal and inspection of boost tubes during maintenance or upgrades.
What's Included
- 1× Perrin Performance Front Mount Intercooler Boost Tubes (Red Aluminum)
- Black Silicone Couplers
- Hose Clamps
- Installation instructions
Installation & Compatibility
Installation of the Perrin Performance boost tubes is moderately straightforward for enthusiasts familiar with Subaru turbo systems. Basic hand tools are sufficient to remove the factory piping and install the new tubes. The kit is designed for direct bolt-on fitment with no permanent modifications required. However, professional installation is recommended if you are unfamiliar with turbo plumbing or intercooler setups. Proper ECU tuning is advised to maximize performance gains and ensure safe operation when upgrading boost piping.
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Professional Installation: Recommended for best results
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Modifications Required: None
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Verify Compatibility: Confirm fitment for your specific 2015-2021 Subaru WRX STI model and any supporting modifications
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