{"product_id":"perrin-front-mount-intercooler-boost-tube-kit-for-2015-2021-sti-2","title":"Perrin Front Mount Intercooler Boost Tube Kit Red 2015-2021 STI","description":"\u003ch3\u003ePerrin Front Mount Intercooler Boost Tube Kit Red 2015-2021 STI | 2.25\"-2.75\" Diameter | Performance Boost Tubes\u003c\/h3\u003e\n\n\u003ch4\u003eOverview\u003c\/h4\u003e\n\u003cp\u003eThe Perrin Front Mount Intercooler Boost Tube Kit is a precision-engineered upgrade designed specifically for the 2015-2021 Subaru WRX STI. This kit replaces the restrictive OEM boost tubes with larger diameter, mandrel-bent aluminum tubes that optimize airflow from the turbocharger to the intercooler and throttle body. It is ideal for STI owners seeking to improve boost efficiency and power delivery without compromising reliability or requiring immediate ECU tuning.\u003c\/p\u003e\n\u003cp\u003eBuilt with a stepped diameter design—starting at 2.25 inches at the turbo outlet and expanding to 2.75 inches near the intercooler and throttle body—these tubes reduce pressure drop and turbulence for smoother airflow. The CNC mandrel bending process ensures consistent internal diameter and smooth transitions, while oversized beaded ends secure silicone couplers firmly under all boost conditions. The kit also includes custom CNC-machined aluminum intercooler brackets, a powder-coated coolant overflow tank, and a high-capacity aluminum washer fluid tank to maintain proper clearance and OEM-level fitment.\u003c\/p\u003e\n\u003cp\u003eBy improving charge air cooling and reducing intake restriction, this kit has been dyno-proven to add 10 to 20+ wheel horsepower across various power levels. This balance of performance gains, durability, and ease of installation makes it a practical and effective upgrade for Subaru WRX STI enthusiasts who want reliable power improvements with the option to unlock further gains through tuning.\u003c\/p\u003e\n\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 stepped boost tube diameters from 2.25\" to 2.75\". Constructed from lightweight CNC mandrel-bent aluminum, it delivers improved airflow and boost efficiency for Subaru enthusiasts seeking reliable power gains and OEM-level fitment.\u003c\/p\u003e\n\u003cul style=\"list-style:none;padding:0;margin:0;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Perrin Performance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Front Mount Intercooler Boost Tube Kit Red\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e PSP-ITR-438-3RD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e 2015-2021 Subaru WRX STI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e CNC Mandrel-Bent Aluminum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Powder Coated Red\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e CNC Machined, Mandrel Bent Tubing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBoost Tube Diameter:\u003c\/strong\u003e 2.25\" (Turbo Outlet) to 2.75\" (Intercooler\/Throttle Body)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Tanks:\u003c\/strong\u003e Powder Coated Coolant Overflow Tank, 6061 Aluminum High Capacity Washer Fluid Tank\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e CNC Machined Direct-Mount Aluminum Brackets\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Gains:\u003c\/strong\u003e +10 to 20+ Wheel HP (Dyno Proven)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTuning Required:\u003c\/strong\u003e No tuning required for stock ECU, tuning recommended for additional gains\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eKey Benefits\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePerformance:\u003c\/strong\u003e Increased airflow reduces pressure drop, improving turbo efficiency and power delivery.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e CNC mandrel-bent aluminum tubes resist cracking and deformation under boost pressure.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Direct bolt-on installation with custom brackets and tanks maintains OEM clearance and engine bay packaging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCooling Efficiency:\u003c\/strong\u003e Improved charge air cooling supports consistent performance during spirited driving or track use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAppearance:\u003c\/strong\u003e Powder-coated red finish adds a clean, performance-oriented look under the hood.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValue:\u003c\/strong\u003e No immediate ECU tuning required, allowing power gains without additional expense or complexity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1× Perrin Front Mount Intercooler Boost Tube Kit Red\u003c\/li\u003e\n  \u003cli\u003e1× Powder Coated Coolant Overflow Tank\u003c\/li\u003e\n  \u003cli\u003e1× 6061 Aluminum High Capacity Washer Fluid Tank\u003c\/li\u003e\n  \u003cli\u003e1× Set of CNC Machined Direct-Mount Aluminum Intercooler Brackets\u003c\/li\u003e\n  \u003cli\u003eMounting hardware and silicone couplers\u003c\/li\u003e\n  \u003cli\u003eInstallation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp\u003eThe Perrin Front Mount Intercooler Boost Tube Kit installs using OEM-style mounting points with included hardware, making it largely bolt-on. Basic hand tools and mechanical experience are recommended to ensure proper fitment and hose routing. The included coolant overflow and washer fluid tanks provide necessary clearance for the larger boost tubes without requiring modifications to the engine bay. No ECU tuning is required for stock vehicles, but owners planning further modifications should consider professional tuning to maximize power gains and maintain safe operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProfessional Installation:\u003c\/strong\u003e Recommended for best results\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModifications Required:\u003c\/strong\u003e None\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVerify Compatibility:\u003c\/strong\u003e Confirm fitment for 2015-2021 Subaru WRX STI models\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eShop with confidence at Subimods—your Subaru parts specialists.\u003c\/p\u003e","brand":"Perrin Performance","offers":[{"title":"Default Title","offer_id":46574239285423,"sku":"PSP-ITR-438-3RD","price":1008.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/3598\/4815\/files\/perrin-front-mount-intercooler-boost-tube-kit-red-2015-2021-sti-psp-itr-438-3rd-8554485.jpg?v=1771630091","url":"https:\/\/subimods.com\/products\/perrin-front-mount-intercooler-boost-tube-kit-for-2015-2021-sti-2","provider":"Subimods.com","version":"1.0","type":"link"}