{"product_id":"stainless-steel-exhaust-header-for-subaru-impreza-wrx-2002-2005-2-0l","title":"Stainless Steel Exhaust Header for Subaru Impreza WRX (2002-2005) 2.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Stainless Steel Exhaust Header for 2002-2005 Subaru WRX (GD\/GG)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Stainless Steel Exhaust Header replaces the restrictive factory exhaust manifold on the 2002-2005 Subaru WRX to reduce exhaust backpressure, improve scavenging, and accelerate turbo spool.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Subaru WRX Exhaust Manifold Bottleneck\u003c\/h3\u003e\n\u003cp\u003eThe OEM cast iron exhaust manifold on the \u003cstrong\u003eGD\/GG\u003c\/strong\u003e chassis \u003cstrong\u003eEJ205\u003c\/strong\u003e creates substantial exhaust turbulence and backpressure. Cast iron retains excessive thermal mass, while the rough internal cast walls and sharp junction angles disrupt laminar exhaust gas velocity. This restriction hinders cylinder scavenging during the valve overlap cycle, drives up exhaust gas temperatures (EGTs), and dampens dynamic throttle response under load. Over repeated thermal cycles, factory cast units are also prone to fatigue, stress fracturing, and flange warping that compromise the primary exhaust seal.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered for optimal gas evacuation, this performance header utilizes smooth, mandrel-bent \u003cstrong\u003eT-304 stainless steel\u003c\/strong\u003e tubing configured with 1.5-inch primary runners and a 2.0-inch merged collector. The tuned tubular runners promote inertial scavenging, effectively drawing burned gases out of the combustion chambers and expediting mass airflow directly to the turbocharger up-pipe. Thick CNC-machined mounting flanges prevent heat distortion across the cylinder head exhaust ports. Fabricated with precision TIG welds and a polished corrosion-resistant finish, it lowers rotational mass, eliminates pre-turbine exhaust choke points, and provides a direct-fit 4-bolt connection compatible with the factory up-pipe layout.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Exhaust Header\u003c\/li\u003e\n  \u003cli\u003e3 Gaskets\u003c\/li\u003e\n  \u003cli\u003eMounting Bolts and Nuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2002-2005 Subaru WRX\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eEJ205 \/ GD, GG\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e227 hp \/ 217 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2002-2005 Subaru Impreza WRX 2.0L EJ205 Turbo\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the GD\/GG WRX?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2002-2005 Subaru WRX equipped with the \u003cstrong\u003eEJ205\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to retorque the mounting hardware after installation?\u003c\/h4\u003e\n\u003cp\u003eYes, inspect and retorque all header bolts following the first few thermal cycles to ensure an airtight seal against the cylinder head and up-pipe.\u003c\/p\u003e\n\n\u003ch3\u003eThe Subaru Performance Caliber\u003c\/h3\u003e\n\u003cp\u003eDesigned for the enthusiast demand of the boxer engine platform, this tubular stainless steel header optimizes gas velocity to yield sharp throttle response, faster boost threshold recovery, and a distinct, refined exhaust note.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67896012570872,"sku":"DS-EGZ1Q76J3","price":156.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/stainless-steel-exhaust-header-for-subaru-impreza-wrx-2002-2005-2-0l-1.jpg?v=1793290903","url":"https:\/\/performancechiptuning.com\/products\/stainless-steel-exhaust-header-for-subaru-impreza-wrx-2002-2005-2-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}