{"product_id":"iag-performance-unequal-length-3-bolt-header-uppipe-for-02-14-wrx-04-21-sti-05-09-lgt-04-08-fxt","title":"IAG Unequal Length 3-Bolt Header \u0026 Uppipe 02-14 WRX \/ 04-21 STI \/ 05-09 Legacy GT \/ 04-08 Forester XT","description":"\u003ch3\u003eIAG Unequal Length 3-Bolt Header \u0026amp; Uppipe 02-14 WRX \/ 04-21 STI \/ 05-09 Legacy GT \/ 04-08 Forester XT | 304 Stainless Steel | Performance Exhaust Header Kit\u003c\/h3\u003e\n\n\u003ch4\u003eOverview\u003c\/h4\u003e\n\u003cp\u003eThe IAG Unequal Length 3-Bolt Header \u0026amp; Uppipe is a high-performance exhaust upgrade designed specifically for a wide range of Subaru models including the WRX, WRX STI, Legacy GT, and Forester XT. This header and uppipe combo enhances exhaust flow with its 45mm diameter pipes and unequal length design, delivering improved power and throttle response while preserving the signature Subaru Boxer engine sound. It’s ideal for enthusiasts seeking a reliable, durable upgrade that supports both street and track driving.\u003c\/p\u003e\n\u003cp\u003eConstructed entirely from premium 304 stainless steel, including cast stainless flanges, this header set is built for longevity and resistance to heat and corrosion. The design incorporates a slip-joint expansion section to accommodate thermal expansion and reduce stress on the exhaust system. Fully TIG welded for strength and precision, the IAG header and uppipe package includes all necessary hardware and multi-layer gaskets to ensure a leak-free, secure installation. IAG’s engineering expertise shines through in the attention to detail and quality control, making this a standout option for Subaru owners.\u003c\/p\u003e\n\u003cp\u003eBy improving exhaust scavenging and flow dynamics, this header and uppipe combination unlocks power gains across the entire RPM range, enhancing acceleration and overall engine efficiency. The inclusion of specialty copper flange nuts and zinc-plated bolts ensures durability under extreme heat cycling conditions common in turbocharged Subaru engines. This upgrade is a practical and effective way to elevate your Subaru’s performance while maintaining reliability and the iconic Boxer rumble.\u003c\/p\u003e\n\n\u003ch4\u003eFeatures \u0026amp; Specifications\u003c\/h4\u003e\n\u003cp\u003eThis IAG Performance header and uppipe kit is engineered for Subaru WRX, WRX STI, Legacy GT, and Forester XT models, featuring 304 stainless steel construction and a 45mm pipe diameter for optimal exhaust flow and durability. Designed to improve power delivery and maintain OEM-level reliability, it is a direct bolt-on solution with included hardware and gaskets for a complete installation.\u003c\/p\u003e\n\u003cul style=\"list-style:none;padding:0;margin:0;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e IAG Performance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Unequal Length 3-Bolt Header \u0026amp; Uppipe\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e IAG-EXT-1000\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e 2002-2014 WRX, 2004-2021 WRX STI, 2005-2009 Legacy GT, 2004-2008 Forester XT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 304 Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Natural Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Fully TIG Welded, Cast Stainless Flanges\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Not Specified\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePipe Diameter:\u003c\/strong\u003e 45mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExpansion Joint:\u003c\/strong\u003e Slip-Joint Section for Heat Cycling\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Hardware:\u003c\/strong\u003e Copper Flange Nuts, Zinc-Plated Bolts and Studs\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 Improves exhaust flow for power gains across the entire RPM range\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e 304 stainless steel construction resists corrosion and withstands high temperatures\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Designed specifically for multiple Subaru platforms with included hardware for a secure, leak-free installation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReliability:\u003c\/strong\u003e Slip-joint expansion accommodates thermal expansion, reducing stress and preventing cracks\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSound:\u003c\/strong\u003e Maintains the iconic Boxer rumble that Subaru enthusiasts value\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality:\u003c\/strong\u003e Fully TIG welded with cast stainless flanges for strength and precision\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1× IAG Unequal Length Stainless Steel Header\u003c\/li\u003e\n  \u003cli\u003e1× IAG 3-Bolt Stainless Steel Uppipe (60mm)\u003c\/li\u003e\n  \u003cli\u003e1× 3-Bolt Uppipe Gasket\u003c\/li\u003e\n  \u003cli\u003e3× Uppipe to Manifold Zinc Plated Bolts and Nuts\u003c\/li\u003e\n  \u003cli\u003e5× Uppipe to Turbo Threaded Studs\u003c\/li\u003e\n  \u003cli\u003e1× EGT Plug\u003c\/li\u003e\n  \u003cli\u003e6× Copper Flange Nuts (Manifold to Head)\u003c\/li\u003e\n  \u003cli\u003e2× Manifold to Cylinder Head Gaskets\u003c\/li\u003e\n  \u003cli\u003e1× Uppipe to Turbo Gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp\u003eInstallation of the IAG Unequal Length Header \u0026amp; Uppipe requires moderate mechanical skill and some special considerations. The package includes all necessary hardware and gaskets, but slight modifications to the passenger side U-frame are required on 2002-2007 WRX\/STI chassis. Additionally, certain model years require STI oil pans and oil coolers for proper fitment. Professional installation is recommended to ensure proper torque and alignment, especially given the thermal expansion design features and the importance of leak-free sealing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProfessional Installation:\u003c\/strong\u003e Recommended\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModifications Required:\u003c\/strong\u003e Slight passenger side U-frame modification on 2002-07 WRX\/STI; STI oil pan and oil cooler required on select years\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVerify Compatibility:\u003c\/strong\u003e Confirm fitment for your specific year and trim level before purchase\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eShop with confidence at Subimods—your Subaru parts specialists.\u003c\/p\u003e","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":47109046730927,"sku":"IAG-EXT-1000","price":849.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/3598\/4815\/files\/iag-unequal-length-3-bolt-header-uppipe-02-14-wrx-04-21-sti-05-09-legacy-gt-04-08-forester-xt-iag-ext-1000-8719495.jpg?v=1782324731","url":"https:\/\/subimods.com\/products\/iag-performance-unequal-length-3-bolt-header-uppipe-for-02-14-wrx-04-21-sti-05-09-lgt-04-08-fxt","provider":"Subimods.com","version":"1.0","type":"link"}