{"product_id":"flowmaster-05-09-ford-mustang-v6-american-thunder-axle-back-exhaust-system","title":"05-09 Ford Mustang V6 4.0L Flowmaster 17421 American Thunder Axle-back Exhaust System","description":"\u003ch2\u003e\u003cstrong\u003eFlowmaster American Thunder Axle-Back Exhaust System - Part #17421\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe Flowmaster American Thunder Axle-Back Exhaust System (Part #17421) is engineered to give the 2005-2009 Ford Mustang V6 a deeper, performance-inspired exhaust note while enhancing the vehicle's iconic muscle car styling. Featuring durable 16-gauge mandrel-bent aluminized steel construction and a premium 60 Series Delta Flow chambered muffler, this system delivers a moderate yet aggressive exhaust tone that is ideal for daily driving and spirited weekend cruising. Designed as a direct-fit axle-back replacement, the system utilizes the factory hanger locations and includes all required installation hardware for a straightforward upgrade. Finished with a large polished 304 stainless steel exhaust tip, this exhaust not only improves appearance but also helps deliver better throttle response, increased exhaust flow, and the unmistakable Flowmaster sound Mustang enthusiasts expect.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFlowmaster American Thunder axle-back exhaust system.\u003c\/li\u003e\n\u003cli\u003ePart Number: 17421.\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for 2005-2009 Ford Mustang V6 models.\u003c\/li\u003e\n\u003cli\u003eConstructed from durable 16-gauge mandrel-bent aluminized steel.\u003c\/li\u003e\n\u003cli\u003e60 Series Delta Flow chambered performance muffler.\u003c\/li\u003e\n\u003cli\u003eModerate interior sound with a moderately aggressive exterior exhaust tone.\u003c\/li\u003e\n\u003cli\u003eDyno-tuned to help maximize exhaust flow and performance.\u003c\/li\u003e\n\u003cli\u003eLarge polished 304 stainless steel exhaust tip for an aggressive rear appearance.\u003c\/li\u003e\n\u003cli\u003eUses factory mounting locations for a precise fit.\u003c\/li\u003e\n\u003cli\u003eIncludes clamps, hangers, hardware, and installation components.\u003c\/li\u003e\n\u003cli\u003eDirect-fit axle-back design requires no major modifications.\u003c\/li\u003e\n\u003cli\u003eCompatible with both coupe and convertible models.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eProduces the signature Flowmaster performance sound without excessive interior drone.\u003c\/li\u003e\n\u003cli\u003eHelps improve throttle response and overall engine efficiency.\u003c\/li\u003e\n\u003cli\u003eSupports increased exhaust flow for enhanced performance potential.\u003c\/li\u003e\n\u003cli\u003eUpgrades the Mustang's appearance with a polished stainless steel exhaust tip.\u003c\/li\u003e\n\u003cli\u003eQuality materials provide excellent durability for long service life.\u003c\/li\u003e\n\u003cli\u003eBolt-on installation minimizes installation time and complexity.\u003c\/li\u003e\n\u003cli\u003eBacked by Flowmaster's Limited Lifetime Warranty for added confidence in long-term ownership.\u003c\/li\u003e\n\u003cli\u003e\u003cbr\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Specifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Flowmaster\u003c\/li\u003e\n\u003cli\u003ePart Number: 17421\u003c\/li\u003e\n\u003cli\u003eProduct Type: Axle-Back Exhaust System\u003c\/li\u003e\n\u003cli\u003eExhaust Series: American Thunder\u003c\/li\u003e\n\u003cli\u003eMaterial: 16-Gauge Mandrel-Bent Aluminized Steel\u003c\/li\u003e\n\u003cli\u003ePipe Material: Aluminized Steel\u003c\/li\u003e\n\u003cli\u003ePipe Finish: Aluminized\u003c\/li\u003e\n\u003cli\u003ePipe Color: Black\u003c\/li\u003e\n\u003cli\u003eMain Pipe Diameter: 2.50 inches\u003c\/li\u003e\n\u003cli\u003eInlet Diameter: 2.50 inches\u003c\/li\u003e\n\u003cli\u003eInlet Connection: Slip-Fit Clamp-On\u003c\/li\u003e\n\u003cli\u003eMuffler Series: 60 Series Delta Flow\u003c\/li\u003e\n\u003cli\u003eMuffler Type: Chambered\u003c\/li\u003e\n\u003cli\u003eMuffler Material: Aluminized Steel\u003c\/li\u003e\n\u003cli\u003eMuffler Finish: Black High-Temperature Paint\u003c\/li\u003e\n\u003cli\u003eMuffler Shape: Oval\u003c\/li\u003e\n\u003cli\u003eMuffler Dimensions: 13.00 in. Length x 10.00 in. Width x 5.00 in. Height\u003c\/li\u003e\n\u003cli\u003eExit Style: Single Rear Exit\u003c\/li\u003e\n\u003cli\u003eExhaust Tip Material: Polished 304 Stainless Steel\u003c\/li\u003e\n\u003cli\u003eExhaust Tip Diameter: 3.50 inches\u003c\/li\u003e\n\u003cli\u003eExhaust Tip Length: 5.25 inches\u003c\/li\u003e\n\u003cli\u003eExhaust Tip Shape: Round\u003c\/li\u003e\n\u003cli\u003eExhaust Tip Edge: Rolled Angle Cut\u003c\/li\u003e\n\u003cli\u003eExhaust Tip Wall: Single Wall\u003c\/li\u003e\n\u003cli\u003eSound Level: Moderate\u003c\/li\u003e\n\u003cli\u003eClamps Included: Yes\u003c\/li\u003e\n\u003cli\u003eHangers Included: Yes\u003c\/li\u003e\n\u003cli\u003eCatalytic Converter Included: No\u003c\/li\u003e\n\u003cli\u003eDrive Type: 2WD\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eInstall Difficulty Level\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eEasy.\u003c\/strong\u003e This direct-fit axle-back system is designed to install using the factory hanger locations and included hardware with no cutting or fabrication normally required. Basic hand tools are all that are typically needed, making this an excellent upgrade for DIY enthusiasts. Under ideal conditions, installation can be completed in as little as \u003cstrong\u003e30 minutes\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFits the following vehicles:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2005 Ford Mustang 4.0L V6 - Coupe\u003c\/li\u003e\n\u003cli\u003e2005 Ford Mustang 4.0L V6 - Convertible\u003c\/li\u003e\n\u003cli\u003e2006 Ford Mustang 4.0L V6 - Coupe\u003c\/li\u003e\n\u003cli\u003e2006 Ford Mustang 4.0L V6 - Convertible\u003c\/li\u003e\n\u003cli\u003e2007 Ford Mustang 4.0L V6 - Coupe\u003c\/li\u003e\n\u003cli\u003e2007 Ford Mustang 4.0L V6 - Convertible\u003c\/li\u003e\n\u003cli\u003e2008 Ford Mustang 4.0L V6 - Coupe\u003c\/li\u003e\n\u003cli\u003e2008 Ford Mustang 4.0L V6 - Convertible\u003c\/li\u003e\n\u003cli\u003e2009 Ford Mustang 4.0L V6 - Coupe\u003c\/li\u003e\n\u003cli\u003e2009 Ford Mustang 4.0L V6 - Convertible\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor questions about this product or to report product description inaccuracies, contact the MPT Performance experts at (407) 636-7077 or by email.\u003c\/p\u003e","brand":"Flowmaster","offers":[{"title":"Default Title","offer_id":47771423703218,"sku":"FLO17421","price":478.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0607\/4341\/8034\/files\/d664f14ad4216c25b2dad664e9648e68e90504d9.webp?v=1785404689","url":"https:\/\/morepowertuning.com\/products\/flowmaster-05-09-ford-mustang-v6-american-thunder-axle-back-exhaust-system","provider":"More Power Tuning","version":"1.0","type":"link"}