{"product_id":"flowmaster-21-25-f-150-outlaw-direct-fit-muffler","title":"21-26 Ford F-150 2.7L\/3.5L\/5.0L Flowmaster 818171 Outlaw Direct Fit Muffler","description":"\u003ch2\u003e\u003cstrong\u003eFlowmaster Outlaw Direct Fit Muffler – Part Number 818171\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe Flowmaster Outlaw Direct Fit Muffler for the 2021-2026 Ford F-150 delivers an aggressive exhaust note and performance-focused design without requiring a complete exhaust replacement. Designed for 2.7L, 3.5L, and 5.0L non-PowerBoost engines equipped with factory dual tailpipes, this direct-fit system replaces only the factory muffler and over-axle pipes while reusing the factory dual tailpipes and tips. Durable 409 stainless steel construction, 3.00-inch mandrel-bent tubing, and a Flowmaster Outlaw Series muffler provide a performance-oriented exhaust upgrade with optimized exhaust gas flow. Dyno testing showed gains of up to 16 horsepower and 21 lb-ft at the rear wheels, making this system an attractive choice for F-150 owners seeking a more aggressive sound and performance-focused exhaust setup.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for 2021-2026 Ford F-150 models with 2.7L, 3.5L, and 5.0L non-PowerBoost engines.\u003c\/li\u003e\n\u003cli\u003eFits trucks equipped with factory dual tailpipes.\u003c\/li\u003e\n\u003cli\u003eFlowmaster Outlaw Series chambered muffler delivers an aggressive exhaust sound.\u003c\/li\u003e\n\u003cli\u003e3.00-inch mandrel-bent pipes support efficient exhaust gas flow.\u003c\/li\u003e\n\u003cli\u003eConstructed from durable 409 stainless steel throughout.\u003c\/li\u003e\n\u003cli\u003eReplaces the factory muffler and over-axle pipes only.\u003c\/li\u003e\n\u003cli\u003eReuses the factory dual tailpipes and tips.\u003c\/li\u003e\n\u003cli\u003eUses existing factory hangers for a direct-fit installation.\u003c\/li\u003e\n\u003cli\u003eIncludes clamps, hangers, installation instructions, and necessary installation hardware.\u003c\/li\u003e\n\u003cli\u003eDyno-tested performance gains of up to 16 horsepower and 21 lb-ft at the rear wheels.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eProvides an aggressive exhaust note for a more performance-oriented F-150 sound.\u003c\/li\u003e\n\u003cli\u003eOffers a direct-fit upgrade without replacing the factory dual tailpipes and tips.\u003c\/li\u003e\n\u003cli\u003e3.00-inch mandrel-bent tubing promotes strong exhaust flow and performance.\u003c\/li\u003e\n\u003cli\u003e409 stainless steel construction provides durable exhaust-system performance.\u003c\/li\u003e\n\u003cli\u003eFactory hanger compatibility helps simplify installation.\u003c\/li\u003e\n\u003cli\u003ePerformance testing demonstrated gains of up to 16 horsepower and 21 lb-ft at the rear wheels.\u003c\/li\u003e\n\u003cli\u003eBacked by Flowmaster's Lifetime Limited Warranty for added ownership confidence.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Specifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePart Number: 818171\u003c\/li\u003e\n\u003cli\u003eBrand: Flowmaster\u003c\/li\u003e\n\u003cli\u003eProduct Type: Exhaust System\u003c\/li\u003e\n\u003cli\u003ePart Type: Exhaust Muffler Assembly\u003c\/li\u003e\n\u003cli\u003eSystem Type: Direct-Fit Muffler\u003c\/li\u003e\n\u003cli\u003eExhaust Series: Outlaw\u003c\/li\u003e\n\u003cli\u003eMuffler Series: 10 Series\u003c\/li\u003e\n\u003cli\u003eMuffler Type: Chambered\u003c\/li\u003e\n\u003cli\u003eMuffler Shape: Oval\u003c\/li\u003e\n\u003cli\u003eSound Level: Aggressive\u003c\/li\u003e\n\u003cli\u003eMaterial: 409 Stainless Steel\u003c\/li\u003e\n\u003cli\u003ePipe and Tubing Material: 409 Stainless Steel\u003c\/li\u003e\n\u003cli\u003eMain Piping Diameter: 3.00 inches\u003c\/li\u003e\n\u003cli\u003eTubing Diameter: 3.00 inches\u003c\/li\u003e\n\u003cli\u003eMuffler Inlet Diameter: 3.00 inches\u003c\/li\u003e\n\u003cli\u003eMuffler Outlet Diameter: 3.00 inches\u003c\/li\u003e\n\u003cli\u003eInlet Quantity: 1\u003c\/li\u003e\n\u003cli\u003eOutlet Quantity: 2\u003c\/li\u003e\n\u003cli\u003eOutlet Configuration: Dual\u003c\/li\u003e\n\u003cli\u003eInlet Location: Center\u003c\/li\u003e\n\u003cli\u003eMuffler Inlet Location: Center\u003c\/li\u003e\n\u003cli\u003eMuffler Outlet Location: Dual\u003c\/li\u003e\n\u003cli\u003eInlet Type: Slip-Fit\u003c\/li\u003e\n\u003cli\u003eOutlet Type: Slip-Fit\u003c\/li\u003e\n\u003cli\u003eMount Type: Uses Factory Hangers\u003c\/li\u003e\n\u003cli\u003eBody Height: 4.00 inches\u003c\/li\u003e\n\u003cli\u003eBody Width: 9.50 inches\u003c\/li\u003e\n\u003cli\u003eBody Length: 6.50 inches\u003c\/li\u003e\n\u003cli\u003eMuffler Overall Length: 12.20 inches\u003c\/li\u003e\n\u003cli\u003eOverall System Length: 55.20 inches\u003c\/li\u003e\n\u003cli\u003eMuffler Material: 409 Stainless Steel\u003c\/li\u003e\n\u003cli\u003eMuffler Color: Black\u003c\/li\u003e\n\u003cli\u003eMuffler Finish: Black High-Temperature Paint Finish\u003c\/li\u003e\n\u003cli\u003eSystem Finish: High-Temperature Paint\u003c\/li\u003e\n\u003cli\u003eClamping Type: Flat Band\u003c\/li\u003e\n\u003cli\u003eClamps Included: Yes\u003c\/li\u003e\n\u003cli\u003eHangers Included: Yes\u003c\/li\u003e\n\u003cli\u003eExhaust Tips: Not Included; reuses factory tips\u003c\/li\u003e\n\u003cli\u003eHeat Shield Attached: No\u003c\/li\u003e\n\u003cli\u003eGasket or Seal Included: No\u003c\/li\u003e\n\u003cli\u003eSpring Bolt Kit Included: No\u003c\/li\u003e\n\u003cli\u003eEmissions Code: 5\u003c\/li\u003e\n\u003cli\u003eCalifornia Proposition 65 Required: Yes\u003c\/li\u003e\n\u003cli\u003eCalifornia Proposition 65 Chemicals: Chromium (hexavalent compounds) and Nickel (metallic)\u003c\/li\u003e\n\u003cli\u003eUPC: 090127846599\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 The direct-fit design replaces the factory muffler and over-axle pipes while reusing the factory dual tailpipes, tips, and factory hangers. Installation instructions and the necessary hardware are included, making this a straightforward upgrade for a properly equipped home garage. Installation can take approximately 45 minutes.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e2021-2026 Ford F-150\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMake: Ford\u003c\/li\u003e\n\u003cli\u003eModel: F-150\u003c\/li\u003e\n\u003cli\u003eEngine: 2.7L, 3.5L, or 5.0L\u003c\/li\u003e\n\u003cli\u003eEngine Configuration: Standard non-PowerBoost\u003c\/li\u003e\n\u003cli\u003eExhaust Configuration: Factory dual tailpipes\u003c\/li\u003e\n\u003cli\u003eFactory Exhaust Requirement: Originally produced with optional dual exhaust exiting through the rear bumper\u003c\/li\u003e\n\u003cli\u003eDoes Not Fit: PowerBoost hybrid models\u003c\/li\u003e\n\u003cli\u003eDoes Not Fit: Models originally produced with single-side-exit exhaust\u003c\/li\u003e\n\u003cli\u003eDoes Not Fit: Models with the OEM active exhaust option\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":47766408691890,"sku":"FLO818171","price":478.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0607\/4341\/8034\/files\/7b0cbd561279b8f5434082197e90110aL.jpg?v=1785248099","url":"https:\/\/morepowertuning.com\/products\/flowmaster-21-25-f-150-outlaw-direct-fit-muffler","provider":"More Power Tuning","version":"1.0","type":"link"}