{"product_id":"stainless-steel-shorty-headers-for-ford-f-150-2004-2008-4-6l","title":"Stainless Steel Shorty Headers for Ford F-150 (2004-2008) 4.6L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Stainless Steel Shorty Headers for 2004-2008 Ford F-150 (P221)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Stainless Steel Shorty Headers replace restrictive cast iron manifolds on the 2004-2008 Ford F-150 to reduce exhaust backpressure and improve cylinder scavenging.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ford F-150 Manifold Warping \u0026amp; Flow Restriction\u003c\/h3\u003e\n\u003cp\u003eThe OEM cast iron exhaust manifolds on the \u003cstrong\u003eP221\u003c\/strong\u003e chassis \u003cstrong\u003e4.6L Modular V8\u003c\/strong\u003e suffer from thermal fatigue and severe flow bottlenecks. Repetitive thermal cycling causes the factory log-style castings to warp and crack, frequently shearing the factory manifold studs inside the cylinder head—most notably on the rear cylinders. Furthermore, the cramped, uneven factory runners create exhaust reversion and parasitic backpressure, which chokes exhaust gas velocity and hampers low-end torque during towing.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis header system replaces failure-prone iron with smooth, mandrel-bent stainless steel primary tubes joined by robust TIG welds. The engineered runner profiles balance exhaust pulses into the collector, accelerating gas evacuation while maintaining direct compatibility with the factory catalytic converters and Y-pipe. To eliminate the chronic issue of rusted and sheared fasteners, the assembly includes a complete suite of hardened stainless steel hardware engineered to handle extreme thermal expansion without fatigue.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 Stainless Steel Shorty Headers (Driver and Passenger)\u003c\/li\u003e\n  \u003cli\u003e2 Header Gaskets\u003c\/li\u003e\n  \u003cli\u003e16 Hardened Stainless Steel Header Bolts\u003c\/li\u003e\n  \u003cli\u003e4 Collector Bolts with 4 Nuts\u003c\/li\u003e\n  \u003cli\u003eWashers for Collector and Header Bolts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2004-2008 Ford F-150\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e4.6L Modular 2V V8 \/ P221\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e231 hp \/ 293 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2004-2008 Ford F-150 4.6L SOHC V8 (2WD and 4WD)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the P221 F-150?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2004-2008 Ford F-150 equipped with the \u003cstrong\u003e4.6L SOHC Modular V8\u003c\/strong\u003e. \u003cstrong\u003eDoes not fit models equipped with the 4.2L V6 or 5.4L V8 engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDo I need custom exhaust fabrication or an aftermarket tune?\u003c\/h4\u003e\n\u003cp\u003eNo, these shorty headers bolt directly to your factory Y-pipe connections and retain stock O2 sensor placement without triggering check engine lights or requiring ECU recalibration.\u003c\/p\u003e\n\n\u003ch3\u003eThe Ford Truck Caliber\u003c\/h3\u003e\n\u003cp\u003eBuilt for continuous work site demands and heavy towing cycles, these stainless shorty headers deliver durable structural reliability and restored exhaust flow to keep your half-ton running strong.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67612790980856,"sku":"DS-E44X5ZUEC","price":631.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/stainless-steel-shorty-headers-for-ford-f-150-2004-2008-4-6l-1.jpg?v=1791607503","url":"https:\/\/performancechiptuning.com\/de\/products\/stainless-steel-shorty-headers-for-ford-f-150-2004-2008-4-6l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}