The exhaust manifolds found in the 1966-1977 Small Block Ford powered Broncos were designed to combine the exhaust gasses from each of the cylinders quickly with a manifold that was cost effective to produce. Our 4-1 Long Tube off-road headers are designed to allow the exhaust gasses to flow more freely from each 4 cylinder bank and combine in a more efficient manner. Tubing has been optimized for the 4.7L(289ci) and 5.0L(302ci) engines. This creates a reduction in cylinder backpressure and improved exhaust gas velocity. These improvements free up lost horsepower and torque. An added benefit is a more performance oriented exhaust sound.
Package Included:
1 x Set of Exhaust Headers
Compatible with:
66-77 Ford Bronco 4.7L / 5.0L V8
  • High Quality T-304 Stainless Steel with Computerized Mandrel-Bends for Strength and Durability i.e. Maximizing Smoothest High Exhaust Air Flow Rate
  • 4-1 High Performance Racing Spec. Design, Produces the Most Top End Power
  • Offers the Best Flow Characteristics for the Engine at High Engine Speeds
  • Increase High Flow Air, Instantly Gain 10 -15 Hp. / Tq.
  • Inlet/Outlet: 1.5"(OD)/ 3.00"(OD) / 2.5" Exhaust Collector Reducer / 16 Gauge Wall Piping / Metal Gasket Included

For 66-77 Ford Bronco 4.7/5.0L V8 2PC Stainless Steel Long Tube Exhaust Header

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