{"product_id":"apr-21-25-audi-rs6-rs7-c8-catback-exhaust-system","title":"APR 21-25 Audi RS6\/RS7 (C8) Catback Exhaust System","description":"The entire system is increased to a dual 3” (72mm) exhaust path. With the exhaust valves open, the exhaust gasses travel uninterrupted from the front of the system out through the exhaust tips. When exhaust gasses travel into the multichambered rear muffler \/ resonator, they continue uninterrupted and a Helmholtz resonator reduces drone frequences without restricting flow on the open-valve path. With the valves closed, exhaust gasses travel through a sound reduction path via a smaller 2.5” (63.5mm) pipe, reducing volume and allowing the system to act more civilized when needed. Finally the system terminates via oversized 8.23”x4.76” (211x21mm) RS-style oval exhaust tips. The tips feature a diamond black finish and a subtle APR logo for a refined touch.\nFits Audi RS6 21-25, RS7 21-25\n\u003cul\u003e\n  \u003cli\u003eSmooth transitions and straight-through components maximize performance by reducing restrictions.\u003c\/li\u003e\n  \u003cli\u003eComplete catalyst-back system including downpipes, extending from the factory catalyst back.\u003c\/li\u003e\n  \u003cli\u003ePrecision brackets and slip clamps ensure accurate alignment and hassle-free installation.\u003c\/li\u003e\n  \u003cli\u003ePremium T304 stainless steel construction with TIG welding for strength and durability.\u003c\/li\u003e\n  \u003cli\u003eStrikes the perfect balance of power, sound, style, and quality for enthusiasts.\u003c\/li\u003e\n  \u003cli\u003ePerformance gains of 9 HP and 16 FT-LBS of torque delivered to all four wheels.\u003c\/li\u003e\n  \u003cli\u003eValve-controlled rear mufflers dynamically adjust sound based on driving style.\u003c\/li\u003e\n  \u003cli\u003eIntegrated Helmholtz resonator minimizes drone and enhances sound quality.\u003c\/li\u003e\n  \u003cli\u003eOptimized flow through dual 3.0” piping with quad exits into dual tips.\u003c\/li\u003e\n  \u003cli\u003eDual 8.23”x4.76” RS-style diamond black oval tips with APR logo.\u003c\/li\u003e\n  \u003cli\u003eFully emissions compliant for worry-free operation.\u003c\/li\u003e\n  \u003cli\u003eMandrel-bent brushed piping for a refined finish.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n2021 Audi RS6 Avant\u003cbr\u003e\n2021 Audi RS7 Sportback\u003cbr\u003e\n2022 Audi RS6 Avant\u003cbr\u003e\n2022 Audi RS7 Sportback\u003cbr\u003e\n2023 Audi RS6 Avant\u003cbr\u003e\n2023 Audi RS7 Sportback\u003cbr\u003e\n2024 Audi RS6 Avant\u003cbr\u003e\n2024 Audi RS7 Sportback\u003cbr\u003e\n2025 Audi RS6 Avant\u003cbr\u003e\n2025 Audi RS7 Sportback\u003cbr\u003e\n2026 Audi RS6 Avant\u003cbr\u003e\n2026 Audi RS7 Sportback\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\nAir Freight Prohibited: false\u003cbr\u003e\nNot Carb Approved: false\u003cbr\u003e\nCarb Acknowledgement Required: true\u003cbr\u003e\nLtl Freight Required: false\u003cbr\u003e\nProp 65: Unknown\u003cbr\u003e\nPart Type: automotive\u003cbr\u003e\nEpa: N\/A\u003cbr\u003e\nUnits Per Sku: 1\u003cbr\u003e\nRegular Stock: t\u003cbr\u003e\nNumber Of Boxes: 2","brand":"APR","offers":[{"title":"Default Title","offer_id":49301461926107,"sku":"aprCBK0050","price":3099.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/8559\/1003\/files\/3fa64f3cfe4eaa94c5df3791fcacd794L.jpg?v=1789232565","url":"https:\/\/hnbperformance.com\/products\/apr-21-25-audi-rs6-rs7-c8-catback-exhaust-system","provider":"Hellnback Offroad \u0026 Performance","version":"1.0","type":"link"}