{"product_id":"exhaust-header-for-ford-bronco-econoline-1961-1974-3-3l","title":"Exhaust Header for Ford Bronco Econoline (1961-1974) 3.3L","description":"\u003ch2\u003eHigh-Flow Stainless Exhaust Header for 1961-1974 Ford Bronco, Econoline\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The performance exhaust header replaces the restrictive cast-iron exhaust manifold on 1961-1974 Ford Bronco and Econoline models to eliminate exhaust backpressure, increase scavenging efficiency, and improve low-end torque.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ford Inline-Six Log Manifold Restriction\u003c\/h3\u003e\n\u003cp\u003eFactory \u003cstrong\u003eFord Thriftpower 200 (3.3L)\u003c\/strong\u003e inline-six engines were engineered with an integrated or tightly coupled cast-iron log manifold design. These OEM castings feature unequal-length runners, sharp 90-degree transitions, and rough interior casting flash that disrupt gas velocity and cause cylinder-to-cylinder reversion. Over decades of heat-cycling under heavy hauling or off-road loads, factory cast iron becomes brittle, resulting in warped flange surfaces, blown gaskets, and persistent hairline stress cracks along the center ports.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eFabricated from heavy-gauge polished stainless steel, this performance tubular manifold utilizes smooth, mandrel-bent primary tubes engineered to maintain uniform cross-sectional area and accelerate exhaust gas scavenging. Precision-welded thick mounting flanges resist thermal warpage and maintain a positive seal against the cylinder head under continuous load. By replacing the choke point of the factory log casting with dedicated, free-flowing runners merging into an optimized collector, exhaust backpressure drops significantly, lowering combustion chamber temperatures and restoring volumetric efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\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;\"\u003e1961-1974 Ford Bronco, Econoline\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;\"\u003e\n\u003cstrong\u003eThriftpower 3.3L (200 ci) I6\u003c\/strong\u003e \/ \u003cstrong\u003eU-Series \/ E-Series\u003c\/strong\u003e\n\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;\"\u003e120 hp \/ 190 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;\"\u003eSPT-EHD1403\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1961-1974 Ford Bronco (U13, U14, U15) 3.3L Inline-6\u003c\/li\u003e\n  \u003cli\u003e1961-1974 Ford Econoline \/ Club Wagon (E-Series) 3.3L Inline-6\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the U-Series and E-Series Bronco and Econoline?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct bolt-on fit for 1961-1974 Ford Bronco and Econoline models equipped with the \u003cstrong\u003eThriftpower 3.3L\u003c\/strong\u003e straight-six engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs carb re-jetting required after installing this tubular header?\u003c\/strong\u003e\u003cbr\u003e Re-jetting is not mandatory, but checking spark plug color and richening the air-fuel mixture slightly can optimize output given the increased volumetric flow.\u003c\/p\u003e\n\n\u003ch3\u003eThe Ford Utility Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to endure high operating temperatures, trail crawling, and heavy cargo duty, this stainless exhaust header provides the structural longevity and exhaust scavenging required for demanding utility applications without flange deflection.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50606880424184,"sku":"DS-E1YPQQ2GQ","price":269.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-header-for-ford-bronco-econoline-1961-1974-3-3l-1.jpg?v=1790090839","url":"https:\/\/performancechiptuning.com\/es\/products\/exhaust-header-for-ford-bronco-econoline-1961-1974-3-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}