{"product_id":"cobb-subaru-stainless-steel-cat-back-exhaust-2015-2021-subaru-wrx-sti-sedan-only","title":"COBB Stainless Steel Catback Exhaust – 2015–2021 Subaru WRX \/ STI","description":"\u003cp\u003eThe \u003cstrong\u003eCOBB Stainless Steel Cat-Back Exhaust\u003c\/strong\u003e for the 2015–2021 Subaru WRX and STI Sedan is built for drivers who want premium construction, proven performance, and a refined exhaust note without going over the top. Designed as a true vehicle-specific system, this cat-back delivers strong flow and excellent fitment while keeping a clean, stock-like appearance.\u003c\/p\u003e\n\n  \u003cp\u003eFrom the cast flanges to the bespoke muffler design, every section of this exhaust is engineered for durability, leak-free installation, and crisp sound quality. The result is an exhaust note that is noticeably more aggressive than stock without introducing unwanted cabin drone.\u003c\/p\u003e\n  \u003cp\u003e\u003ciframe width=\"1241\" height=\"698\" class=\"responsive\" src=\"https:\/\/www.youtube.com\/embed\/FeZmfILXA0U\" title=\"COBB Tuning - Product Highlight - Stainless Steel Cat-Back Subaru for Subaru GV\/VA WRX and STI\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\n  \u003ch3\u003eKey Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003e304 Stainless Steel Construction:\u003c\/strong\u003e High-quality stainless steel throughout for excellent corrosion resistance and long-term durability.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh Quality Cast Y-Split \u0026amp; Flanges:\u003c\/strong\u003e Improves strength, longevity, and sealing compared to welded split designs.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTIG Welded:\u003c\/strong\u003e Clean, precise welds for strength and a premium finish.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAdjustable Slip-Fit Tips:\u003c\/strong\u003e Allows for fine-tuning tip placement for the perfect fit.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRefined Sound Profile:\u003c\/strong\u003e Crisp and noticeable over stock without excessive drone in the cabin.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhy We Like It\u003c\/h3\u003e\n  \u003cp\u003eCOBB has always done a great job of balancing performance and refinement, and this exhaust is a perfect example. It looks clean, fits right, and sounds better than stock without turning the car into a headache on long drives. If you want a premium OEM+ exhaust for a VA sedan, this is one of the safest bets out there.\u003c\/p\u003e\n  \n  \u003ch4\u003eInstalled On Car\u003c\/h4\u003e\n  \u003cp\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0732\/3457\/9704\/files\/515160_extra_13.jpg?v=1775683906\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n  \u003ch3\u003eConstruction Details\u003c\/h3\u003e\n\n  \u003ch4\u003eMid-Pipe\u003c\/h4\u003e\n  \u003cp\u003eAt the front of the system, a high-quality cast flange is machined to accept the factory donut gasket for a leak-free connection. From there, \u003cstrong\u003e3\" stainless steel tubing\u003c\/strong\u003e runs back to another 3\" cast flange where it meets the y-pipe. A flex section is incorporated to add compliance and help reduce stress throughout the system.\u003c\/p\u003e\n\n  \u003ch4\u003eY-Pipe\u003c\/h4\u003e\n  \u003cp\u003eThe y-pipe begins as a \u003cstrong\u003e3\" tube\u003c\/strong\u003e and transitions into \u003cstrong\u003etwin 2.5\" tubes\u003c\/strong\u003e using a cast split section. This improves durability and long-term reliability over traditional welded split designs. All three y-pipe connections use cast flanges to resist distortion and ensure a secure, leak-free fit.\u003c\/p\u003e\n\n  \u003ch4\u003eMufflers\u003c\/h4\u003e\n  \u003cp\u003eThe muffler sections attach to the y-pipe with the same high-quality cast flange design. Each bespoke COBB muffler features a single \u003cstrong\u003e2.5\" inlet\u003c\/strong\u003e and dual \u003cstrong\u003e2.5\" outlets\u003c\/strong\u003e that accept \u003cstrong\u003e3.5\" dual-wall slash-cut tips\u003c\/strong\u003e with laser-etched COBB logos.\u003c\/p\u003e\n\n  \u003ch4\u003eGaskets\u003c\/h4\u003e\n  \u003cp\u003e\u003cstrong\u003eMulti-layer steel (MLS) gaskets\u003c\/strong\u003e are included for all connections to ensure a durable, leak-free install.\u003c\/p\u003e\n\n  \u003ch3\u003eConfirmed Fitment\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e2015–2021 Subaru WRX Sedan\u003c\/li\u003e\n    \u003cli\u003e2015–2021 Subaru STI Sedan\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cstrong\u003eSedan only.\u003c\/strong\u003e\u003c\/p\u003e\n\n  \u003ch3\u003eSpecifications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSystem Type:\u003c\/strong\u003e Cat-back exhaust\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMain Piping:\u003c\/strong\u003e 3\" stainless steel\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eY-Pipe Outlets:\u003c\/strong\u003e Twin 2.5\"\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMuffler Inlet:\u003c\/strong\u003e 2.5\"\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMuffler Outlets:\u003c\/strong\u003e Dual 2.5\"\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTips:\u003c\/strong\u003e 3.5\" dual-wall slash cut, laser-etched COBB logos\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 304 stainless steel\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eDirect bolt-on cat-back for compatible WRX\/STI sedan applications.\u003c\/li\u003e\n    \u003cli\u003eUses the factory donut gasket connection at the front flange.\u003c\/li\u003e\n    \u003cli\u003eMLS gaskets are included for secure sealing at all remaining connections.\u003c\/li\u003e\n    \u003cli\u003eAdjust slip-fit tips after installation for ideal bumper alignment.\u003c\/li\u003e\n    \u003cli\u003eRe-check hardware after the first heat cycle.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhat’s in the Box\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eCOBB stainless steel mid-pipe\u003c\/li\u003e\n    \u003cli\u003eCOBB cast y-pipe section\u003c\/li\u003e\n    \u003cli\u003eCOBB muffler sections\u003c\/li\u003e\n    \u003cli\u003eAdjustable slip-fit tips\u003c\/li\u003e\n    \u003cli\u003eMLS gaskets\u003c\/li\u003e\n    \u003cli\u003eRequired hardware (per COBB kit contents)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCompatibility \u0026amp; Disclaimers\u003c\/h3\u003e\n  \u003cp\u003eDesigned specifically for 2015–2021 Subaru WRX and STI \u003cstrong\u003esedan\u003c\/strong\u003e models only. Exhaust sound may vary depending on other modifications. Always verify fitment before installation and ensure all connections are properly torqued and aligned.\u003c\/p\u003e","brand":"COBB Tuning","offers":[{"title":"Default Title","offer_id":48212282114296,"sku":"cob515160","price":1565.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3457\/9704\/files\/515160_main.jpg?v=1775683475","url":"https:\/\/driven.media\/products\/cobb-subaru-stainless-steel-cat-back-exhaust-2015-2021-subaru-wrx-sti-sedan-only","provider":"Driven.Media","version":"1.0","type":"link"}