{"product_id":"stainless-steel-exhaust-header-up-pipe-for-subaru-impreza-wrx-wrx-sti-2008-2014-2-5l","title":"Stainless Steel Exhaust Header \u0026 Up-Pipe for Subaru Impreza WRX \u0026 WRX STI (2008-2014) 2.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Stainless Steel Exhaust Header \u0026amp; Up-Pipe Kit for 2008-2014 Subaru WRX, WRX STI (GE\/GH\/GR\/GV)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The high-flow exhaust header and up-pipe kit replaces the restrictive factory exhaust manifold on the 2008-2014 Subaru WRX and WRX STI to reduce exhaust backpressure and accelerate turbocharger spool.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Subaru WRX, WRX STI Flow Restriction and Thermal Mass\u003c\/h3\u003e\n\u003cp\u003eFactory exhaust manifolds on the \u003cstrong\u003eEJ255\u003c\/strong\u003e and \u003cstrong\u003eEJ257\u003c\/strong\u003e boxer engines utilize heavy, rough-cast iron runners with abrupt collector angles. This uneven architecture creates severe exhaust turbulence, traps excessive thermal energy around the cylinder heads, and chokes gas velocity ahead of the turbine. Over time, recurring thermal expansion cycles on the cast iron OEM unit stress exhaust studs and delay low-end transient boost response.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eConstructed from mandrel-bent T-304 stainless steel tubing, this header and up-pipe assembly streamlines exhaust scavenging across all four cylinders. Smooth, uniform-radius primary runners merge into a low-restriction collector, maximizing pulse velocity directly into the up-pipe. Thick, precision CNC-machined flanges resist thermal warpage and prevent blowouts under high boost, while the corrosion-resistant polished finish withstands aggressive heat cycling without structural degradation.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x T-304 Stainless Steel Exhaust Header\u003c\/li\u003e\n  \u003cli\u003e1x Matching High-Flow Turbo Up-Pipe\u003c\/li\u003e\n  \u003cli\u003e1x Complete Exhaust Flange Gasket Set\u003c\/li\u003e\n  \u003cli\u003e1x Mounting Bolts and Nuts Hardware Pack\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;\"\u003e2008-2014 Subaru WRX, WRX STI\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;\"\u003e\n\u003cstrong\u003eEJ255\u003c\/strong\u003e, \u003cstrong\u003eEJ257\u003c\/strong\u003e \/ \u003cstrong\u003eGE\u003c\/strong\u003e, \u003cstrong\u003eGH\u003c\/strong\u003e, \u003cstrong\u003eGR\u003c\/strong\u003e, \u003cstrong\u003eGV\u003c\/strong\u003e\n\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;\"\u003e265-305 hp \/ 244-290 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\u003e2008-2014 Subaru Impreza WRX 2.5L EJ255 Turbo\u003c\/li\u003e\n  \u003cli\u003e2008-2014 Subaru Impreza WRX STI 2.5L EJ257 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 GE, GH, GR, GV WRX, WRX STI?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct bolt-on fit for the 2008-2014 Subaru WRX and WRX STI equipped with the \u003cstrong\u003eEJ255\u003c\/strong\u003e or \u003cstrong\u003eEJ257\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 manifold and up-pipe flange hardware after the initial 2 to 3 thermal heat cycles to ensure proper gasket compression and prevent exhaust leaks.\u003c\/p\u003e\n\n\u003ch3\u003eThe Subaru Performance Standard\u003c\/h3\u003e\n\u003cp\u003eFor turbocharged boxer platforms on the \u003cstrong\u003eGR\u003c\/strong\u003e and \u003cstrong\u003eGV\u003c\/strong\u003e chassis, minimizing pre-turbine backpressure is critical for reducing cylinder temperatures and maintaining crisp throttle response throughout the mid-to-high RPM band.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67896021254392,"sku":"DS-ECMR9MRGP","price":160.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/stainless-steel-exhaust-header-up-pipe-for-subaru-impreza-wrx-wrx-sti-2008-2014-2-5l-1.jpg?v=1793291005","url":"https:\/\/performancechiptuning.com\/products\/stainless-steel-exhaust-header-up-pipe-for-subaru-impreza-wrx-wrx-sti-2008-2014-2-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}