{"product_id":"perrin-15-21-subaru-sti-front-mount-intercooler-boost-tube-kit-black","title":"Perrin Front Mount Intercooler Boost Tube Kit Black - 2015-2021 STI","description":"\u003ch3\u003ePerrin Front Mount Intercooler Boost Tube Kit Black 2015-2021 STI | 2.25” to 2.75” Diameter | Aluminum Boost Tubes\u003c\/h3\u003e\n\u003ch4\u003eOverview\u003c\/h4\u003e\n\u003cp\u003eThe Perrin Front Mount Intercooler Boost Tube Kit is designed specifically for the 2015-2021 Subaru WRX STI, offering a direct upgrade to the factory boost tube system. This kit replaces restrictive OEM piping with CNC mandrel bent aluminum tubes that optimize airflow from the turbocharger through the intercooler to the throttle body. It’s ideal for STI owners looking to reduce pressure drop, improve boost response, and unlock additional power potential without the need for immediate ECU tuning.\u003c\/p\u003e\n\u003cp\u003eEngineered with precision, the boost tubes feature a smooth, mandrel-bent design that minimizes turbulence and maximizes airflow efficiency. The tubes increase in diameter from 2.25 inches at the turbo outlet to 2.75 inches near the intercooler and throttle body, ensuring unrestricted air movement. Powder-coated in black, these tubes resist corrosion and maintain a clean, OEM+ appearance. The kit also includes custom CNC-machined aluminum brackets and upgraded coolant and washer fluid tanks to accommodate the new routing, reflecting Perrin’s commitment to quality and functional design.\u003c\/p\u003e\n\u003cp\u003eBy improving charge air cooling and reducing pressure losses, this boost tube kit delivers proven gains of 10 to 20+ wheel horsepower across various power levels. The design maintains OEM clearance for easy installation and compatibility with other modifications. STI owners benefit from enhanced throttle response and more consistent boost delivery, making this an essential upgrade for both street and track applications.\u003c\/p\u003e\n\u003ch4\u003eFeatures \u0026amp; Specifications\u003c\/h4\u003e\n\u003cp\u003eThis Perrin Front Mount Intercooler Boost Tube Kit is engineered for the 2015-2021 Subaru WRX STI and features a progressive diameter design from 2.25” to 2.75”. Constructed from lightweight aluminum with a durable black powder coat finish, it delivers improved airflow and boost efficiency for Subaru enthusiasts seeking reliable power gains without mandatory tuning.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePerrin Performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFront Mount Intercooler Boost Tube Kit Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePSP-ITR-438-3BK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e2015-2021 Subaru WRX STI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBlack powder coat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCNC mandrel bent tubing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUSA (Perrin Performance)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube Diameter:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e2.25” (turbo outlet) to 2.75” (intercooler\/throttle body)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Tanks:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAluminum coolant overflow and washer fluid tanks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCNC-machined direct-mount aluminum brackets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Gains:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e+10 to 20+ Wheel HP (dyno proven)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTuning Required:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNo (tuning recommended for additional gains)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eKey Benefits\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eReduces boost pressure drop for improved throttle response and power delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePowder-coated aluminum resists corrosion and maintains appearance over time\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDesigned specifically for 2015-2021 STI with OEM clearance for hassle-free installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCNC mandrel bending ensures smooth airflow and structural integrity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValue:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAdds significant horsepower gains without requiring immediate ECU recalibration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompleteness:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIncludes upgraded coolant and washer tanks for proper boost tube routing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1× Perrin Front Mount Intercooler Boost Tube Kit Black\u003c\/li\u003e\n\u003cli\u003e1× Perrin Aluminum Coolant Overflow Tank (powder coated)\u003c\/li\u003e\n\u003cli\u003e1× Perrin High Capacity Aluminum Washer Fluid Tank\u003c\/li\u003e\n\u003cli\u003eDirect-mount CNC-machined aluminum intercooler brackets\u003c\/li\u003e\n\u003cli\u003eAll necessary mounting hardware\u003c\/li\u003e\n\u003cli\u003eInstallation instructions\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Perrin Performance","offers":[{"title":"Default Title","offer_id":44668012396614,"sku":"PERPSP-ITR-438-3BK","price":1565.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/5929\/5280\/files\/a92c0bbf6ced2eca1a4a2f9b039aa8cbL.jpg?v=1775768716","url":"https:\/\/subiesupplyco.ca\/products\/perrin-15-21-subaru-sti-front-mount-intercooler-boost-tube-kit-black","provider":"SUBIE SUPPLY CO.","version":"1.0","type":"link"}