{"product_id":"perrin-front-mount-intercooler-boost-tube-kit-for-2015-2021-sti","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\n\u003ch4\u003eOverview\u003c\/h4\u003e\n\u003cp\u003eThe Perrin Front Mount Intercooler Boost Tube Kit is a precision-engineered upgrade designed exclusively for the 2015-2021 Subaru WRX STI. This kit replaces the factory boost tubes with CNC mandrel bent aluminum piping that optimizes airflow from the turbocharger through the intercooler to the throttle body. It is tailored for STI owners seeking to reduce boost pressure drop, improve throttle response, and unlock additional power potential without the immediate need for ECU tuning.\u003c\/p\u003e\n\u003cp\u003eBuilt with a focus on airflow efficiency and durability, the boost tubes feature a progressive diameter design, expanding from 2.25 inches at the turbo outlet to 2.75 inches near the intercooler and throttle body. The smooth mandrel bends minimize turbulence, while the black powder coat finish provides corrosion resistance and an OEM+ aesthetic. Included are custom CNC-machined aluminum brackets and upgraded coolant and washer fluid tanks to accommodate the new routing, reflecting Perrin’s commitment to functional, high-quality components.\u003c\/p\u003e\n\u003cp\u003eThis boost tube kit delivers proven gains of 10 to 20+ wheel horsepower across various power levels by improving charge air cooling and reducing pressure losses. The design maintains OEM clearance for straightforward installation and compatibility with other modifications. Subaru WRX STI owners will notice enhanced throttle response and more consistent boost delivery, making this an essential upgrade for both street and track use.\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 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 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 Black\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e PSP-ITR-438-3BK\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 Aluminum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black powder coat\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e CNC mandrel bent tubing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e USA (Perrin Performance)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTube 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 Aluminum coolant overflow and washer fluid tanks\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 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 Reduces boost pressure drop for improved throttle response and more consistent power delivery.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Powder-coated aluminum resists corrosion and maintains a clean appearance over time.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Designed specifically for 2015-2021 STI with OEM clearance for hassle-free installation and compatibility with other mods.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality:\u003c\/strong\u003e CNC mandrel bending ensures smooth airflow and structural integrity, minimizing turbulence.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValue:\u003c\/strong\u003e Adds significant horsepower gains without requiring immediate ECU recalibration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompleteness:\u003c\/strong\u003e Includes upgraded coolant and washer tanks for proper boost tube routing and fitment.\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 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\n\n\u003ch4\u003eInstallation \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp\u003eInstallation of the Perrin Boost Tube Kit is moderately straightforward for enthusiasts with basic mechanical skills and common hand tools. The kit is designed for direct bolt-on fitment with no permanent modifications required. The included coolant and washer tanks simplify routing and clearance issues commonly encountered with larger diameter piping. While no ECU tuning is required to safely run this kit, proper tuning is recommended to maximize power gains and ensure optimal engine performance. Always verify compatibility with your specific STI model year and any other aftermarket modifications installed.\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\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":46574228996271,"sku":"PSP-ITR-438-3BK","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-black-2015-2021-sti-psp-itr-438-3bk-2801759.jpg?v=1771630095","url":"https:\/\/subimods.com\/products\/perrin-front-mount-intercooler-boost-tube-kit-for-2015-2021-sti","provider":"Subimods.com","version":"1.0","type":"link"}