{"product_id":"flowmaster-american-thunder-axle-back-exhaust-2021-2026-ford-bronco","title":"FLOWMASTER American Thunder Series 3 in Axle-Back Exhaust - 2021+ Ford Bronco 2.3L \/ 2.7L","description":"\u003ch1\u003eFLOWMASTER American Thunder Axle-Back Exhaust – 3 in Stainless Steel | 2021+ Ford Bronco 2.3L \u0026amp; 2.7L\u003c\/h1\u003e\n\u003ch3\u003e3 in Stainless Steel Axle-Back Exhaust | Single Exit | 2021+ Ford Bronco 2.3L \/ 2.7L | SKU: 818121\u003c\/h3\u003e\n\u003cp\u003eUpgrade your Bronco with the \u003cstrong\u003eFLOWMASTER American Thunder Axle-Back Exhaust System (818121)\u003c\/strong\u003e. Designed specifically for the \u003cstrong\u003e2021–2026 Ford Bronco 2.3L and 2.7L EcoBoost\u003c\/strong\u003e, this exhaust system delivers \u003cstrong\u003eclassic Flowmaster sound, improved exhaust performance, and durable stainless steel construction\u003c\/strong\u003e for daily driving and off-road adventures.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eAmerican Thunder Series\u003c\/strong\u003e is engineered to provide the perfect balance between a mild cruising tone and an aggressive sound under throttle with minimal interior drone. Featuring a tuned \u003cstrong\u003e60 Series performance muffler\u003c\/strong\u003e, this system delivers a deep exhaust note while maintaining excellent drivability.\u003c\/p\u003e\n\u003cp\u003eConstructed from \u003cstrong\u003emandrel-bent 409 stainless steel tubing\u003c\/strong\u003e, the 818121 axle-back system improves exhaust flow and durability while enhancing the rear appearance of your Bronco. This single-exit design is ideal for Bronco owners looking for aggressive sound without excessive volume.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSKU: 818121\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFits 2021–2026 Ford Bronco 2.3L \u0026amp; 2.7L EcoBoost\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e3-inch mandrel-bent stainless steel tubing\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eAmerican Thunder Series tuned 60 Series muffler\u003c\/li\u003e\n\u003cli\u003eSingle exit axle-back configuration\u003c\/li\u003e\n\u003cli\u003eAggressive to moderate exhaust tone\u003c\/li\u003e\n\u003cli\u003eMinimal interior drone during cruising\u003c\/li\u003e\n\u003cli\u003eImproves exhaust flow and performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e⚠️ Fitment Note (IMPORTANT)\u003c\/h2\u003e\n\u003cp\u003e❗ \u003cstrong\u003eFits 2021–2026 Ford Bronco 2.3L \u0026amp; 2.7L models\u003c\/strong\u003e\u003cbr\u003e❗ Does NOT fit Bronco Sport models\u003cbr\u003e❗ Always verify trim level and factory exhaust configuration before ordering\u003cbr\u003e❗ Professional installation recommended\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eAmerican Thunder Sound\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDeep aggressive exhaust tone under acceleration\u003c\/li\u003e\n\u003cli\u003eModerate sound level during normal cruising\u003c\/li\u003e\n\u003cli\u003eDesigned to minimize interior drone\u003c\/li\u003e\n\u003cli\u003eTuned specifically for daily-driven Broncos\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e👉 Perfect balance of aggressive sound and everyday drivability\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003ePerformance Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eImproves exhaust flow efficiency\u003c\/li\u003e\n\u003cli\u003eMandrel-bent tubing maximizes airflow\u003c\/li\u003e\n\u003cli\u003eHelps improve throttle response\u003c\/li\u003e\n\u003cli\u003eDyno-tested gains up to 19 HP and 19 lb-ft of torque at the rear wheels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e👉 Performance-inspired sound with improved airflow\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eDurability \u0026amp; Construction\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eConstructed from corrosion-resistant 409 stainless steel\u003c\/li\u003e\n\u003cli\u003eBuilt to withstand harsh weather and off-road conditions\u003c\/li\u003e\n\u003cli\u003eEngineered for long-term durability and performance\u003c\/li\u003e\n\u003cli\u003eDesigned for daily driving and trail use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e👉 Built to perform on and off the trail\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cp\u003eDirect-fit axle-back exhaust installation\u003cbr\u003eProfessional installation recommended\u003cbr\u003eUses factory mounting locations\u003cbr\u003eTypical install time: ~1–2 hours\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFLOWMASTER American Thunder axle-back exhaust system\u003c\/li\u003e\n\u003cli\u003e60 Series performance muffler\u003c\/li\u003e\n\u003cli\u003eInstallation hardware\u003c\/li\u003e\n\u003cli\u003eInstallation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: \u003cstrong\u003eFLOWMASTER\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePart Number: \u003cstrong\u003e818121\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSeries: \u003cstrong\u003eAmerican Thunder\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eExhaust Type: \u003cstrong\u003eAxle-Back Exhaust System\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eTubing Diameter: \u003cstrong\u003e3 Inches\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eExit Configuration: \u003cstrong\u003eSingle Exit\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eMaterial: \u003cstrong\u003e409 Stainless Steel\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eVehicle Fitment: \u003cstrong\u003e2021–2026 Ford Bronco 2.3L \/ 2.7L\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003ePopular Applications\u003c\/h2\u003e\n\u003ch3\u003e👉 2021+ Ford Bronco 2.3L \u0026amp; 2.7L EcoBoost\u003c\/h3\u003e\n\u003cp\u003ePerfect for Bronco owners looking to \u003cstrong\u003eupgrade exhaust sound, improve performance, and maintain comfortable daily drivability\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e👉 Ideal for daily drivers, overland builds, lifted Broncos, and off-road setups\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Buy from Iron Ridge Offroad\u003c\/h2\u003e\n\u003cp\u003e✔ Fast Shipping\u003cbr\u003e✔ Fast Processing\u003cbr\u003e✔ Off-Road Experts You Can Trust\u003cbr\u003e✔ Premium Brands \u0026amp; Proven Products\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eUpgrade your Bronco with the \u003cstrong\u003eFLOWMASTER American Thunder Axle-Back Exhaust System (818121) \u003c\/strong\u003eengineered for aggressive sound, improved performance, and rugged durability.\u003c\/p\u003e","brand":"FLOWMASTER","offers":[{"title":"Default Title","offer_id":47998262444270,"sku":"F13818121","price":535.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/1996\/5678\/files\/c3039ad85dd78177acb379b6e541daf4e9b0b20b.avif?v=1778516249","url":"https:\/\/www.ironridgeoffroad.com\/products\/flowmaster-american-thunder-axle-back-exhaust-2021-2026-ford-bronco","provider":"Iron Ridge Offroad","version":"1.0","type":"link"}