Exhaust Header for Ford Bronco Econoline (1961-1974) 3.3L

High-Flow Stainless Exhaust Header for 1961-1974 Ford Bronco, Econoline

What it Does: 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.

The Stock Ford Inline-Six Log Manifold Restriction

Factory Ford Thriftpower 200 (3.3L) 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.

The Engineering Solution

Fabricated 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.

Technical Specifications

Compatibility

• 1961-1974 Ford Bronco (U13, U14, U15) 3.3L Inline-6
• 1961-1974 Ford Econoline / Club Wagon (E-Series) 3.3L Inline-6

Frequently Asked Questions

Does this fit the U-Series and E-Series Bronco and Econoline?
Yes, this is a direct bolt-on fit for 1961-1974 Ford Bronco and Econoline models equipped with the Thriftpower 3.3L straight-six engine.

Is carb re-jetting required after installing this tubular header?
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.

The Ford Utility Standard

Built 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.