{"product_id":"hi-power-muffler-single-wrxsti","title":"HKS Hi-Power Single Exit Cat Back 2015-2021 WRX \/ 2015-2021 STI","description":"\u003ch3\u003eHKS Hi-Power Single Exit Cat Back 2015-2021 WRX \/ 2015-2021 STI | 85mm Diameter | Performance Exhaust System\u003c\/h3\u003e\n\n\u003ch4\u003eOverview\u003c\/h4\u003e\n\u003cp\u003eThe HKS Hi-Power Single Exit Cat Back exhaust system is designed specifically for the 2015-2021 Subaru WRX and WRX STI, delivering a perfect balance of aggressive sound, reduced back pressure, and weight savings. This system replaces the factory quad-exit setup with a single right-side exit featuring an 85mm pipe and bullet-style muffler, offering a race-inspired aesthetic and a commanding presence on the road. It’s ideal for Subaru enthusiasts seeking enhanced throttle response and a customizable exhaust note for both daily driving and spirited track sessions.\u003c\/p\u003e\n\u003cp\u003eEngineered with precision, the HKS Hi-Power exhaust utilizes high-quality SUH409 coated and SUS304 stainless steel materials for durability and corrosion resistance. The straight-through silencer design minimizes internal restrictions, significantly lowering exhaust back pressure compared to stock. This approach not only improves performance but also maintains a refined sound profile that can be tailored via the removable inner silencer. The adjustable tail tip adds a personal touch, allowing owners to fine-tune the exhaust’s visual stance.\u003c\/p\u003e\n\u003cp\u003eFor Subaru WRX and STI owners, this exhaust system enhances the driving experience by improving engine responsiveness and delivering a versatile sound that adapts to different driving environments. The substantial weight reduction from 22.4kg stock to 13.4kg further contributes to improved handling and agility. Whether navigating city streets or pushing limits on the track, the HKS Hi-Power Single Exit Cat Back offers a reliable and performance-oriented upgrade that complements Subaru’s sporty character.\u003c\/p\u003e\n\n\u003ch4\u003eFeatures \u0026amp; Specifications\u003c\/h4\u003e\n\u003cp\u003eThis HKS Hi-Power Single Exit Cat Back exhaust is engineered for 2015-2021 Subaru WRX and WRX STI models and features an 85mm main pipe diameter with a single right-side exit. Constructed from coated SUH409 and SUS304 stainless steel, it delivers reduced exhaust back pressure and significant weight savings for Subaru enthusiasts seeking improved throttle response and customizable sound.\u003c\/p\u003e\n\u003cul style=\"list-style:none;padding:0;margin:0;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e HKS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Hi-Power Single Exit Cat Back 2015-2021 WRX \/ 2015-2021 STI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 31006-BF003\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e 2015-2021 Subaru WRX, 2015-2021 Subaru WRX STI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e SUH409 (Coated) \/ SUS304 Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Coated stainless steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Straight-through silencer design\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Japan\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMain Pipe Diameter:\u003c\/strong\u003e 85mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTail Pipe Diameter:\u003c\/strong\u003e 119mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExhaust Sound (with Inner Silencer):\u003c\/strong\u003e 82dB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExhaust Sound (without Inner Silencer):\u003c\/strong\u003e 96dB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Ground Clearance:\u003c\/strong\u003e 115mm (Mid-pipe)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 13.4kg (Stock: 22.4kg)\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 Reduced exhaust back pressure improves throttle response and unlocks engine potential for enhanced driving dynamics.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSound Control:\u003c\/strong\u003e Removable inner silencer allows drivers to tailor exhaust volume and tone for city driving or aggressive track use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight Savings:\u003c\/strong\u003e Significant reduction in system weight compared to stock improves vehicle agility and handling.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Designed specifically for 2015-2021 WRX and WRX STI models ensuring precise fit and easy installation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAesthetics:\u003c\/strong\u003e Aggressive single-exit design with adjustable tail tip provides a race-inspired look and personalized style.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e High-quality coated SUH409 and SUS304 stainless steel construction ensures long-lasting corrosion resistance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1× HKS Hi-Power Single Exit Cat Back Exhaust System\u003c\/li\u003e\n  \u003cli\u003eRemovable inner silencer\u003c\/li\u003e\n  \u003cli\u003eAdjustable tail tip\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\u003eThe HKS Hi-Power Single Exit Cat Back exhaust is a direct bolt-on replacement designed for straightforward installation on 2015-2021 Subaru WRX and WRX STI models. While the fitment is precise, professional installation is recommended to ensure proper alignment and to avoid potential exhaust leaks. No major modifications are required, but verify compatibility with your specific trim and any additional aftermarket modifications. Tuning is not required but recommended to maximize performance gains and ensure optimal engine management with the reduced back pressure.\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 None\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVerify Compatibility:\u003c\/strong\u003e Confirm fitment for your specific year and trim level\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eShop with confidence at Subimods—your Subaru parts specialists.\u003c\/p\u003e","brand":"HKS","offers":[{"title":"Default Title","offer_id":47068800549039,"sku":"31006-BF003","price":1499.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/3598\/4815\/files\/701bcb20b4f2de422bd82cc04d20f469L.png?v=1781635911","url":"https:\/\/subimods.com\/products\/hi-power-muffler-single-wrxsti","provider":"Subimods.com","version":"1.0","type":"link"}