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4-1 Long Exhaust Header Manifold For 64-79 Pontiac Small Block SBC 5.7 6.6 7.5

Shipping restriction: This item cannot be shipped to the state of California, New York and Maine.

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Getting more air into your engine and more exhaust out is the key to a performance motor. That's where exhaust headers are significant as the first revenue of an exhaust system. Exhaust performance headers manipulate the air flow with the performance-robbing exhaust manifold that came with your car. Headers provide each cylinder with its own mini exhaust pipe, which means exhaust headers prevent interference among cylinders, thus, the backpressure that occurs in common exhaust manifolds. When cylinders don't have to fight with each other to expel their exhaust, they can put more power through the wheels, Pushing the vehicle. Combining with a high-performance cold air intake and a catback exhaust system, a header system removes all restrictions of your engine, then, it is able to perform at its full potential.

  • Material: T304 Stainless Steel
  • Color: Metallic
  • Surface Finish: Chrome Polished
  • Header Spec: 2x 4-1 Design. 3-Bolt Flange. 3" OD to 2.5" OD Weldable Collector Reducer Flanges.
  • Pipe Spec: 1 Piece Construction on each header. Optimized Tubing for the 5.3L (325ci), 5.7L(350ci), 6.6L(400ci) and 7.5L(455ci) engines
  • Inlet/Outlet: 1.85" OD/3.00" ID
  • Sensor: Included O2 Sensor Insertion
  • Wall Thickness: 3/8" Flange / 16-Gauge Piping Walls
  • Headers are made with high quality stainless steel , Mandrel bent tubing, CNC Machined Flanges.
  • Increase Horsepower and Torque. Gain More performance Due to More Air Flow
  • Better fuel mileage with improved combustion


For 1967-1979 Pontiac Firdbird 5.3L / 5.7L / 6.6L / 7.5L
For 1973-1975 Pontiac Grand Am 5.7L / 6.6L / 7.5L
For 1975-1977 Pontaic Grand LeMans 5.7L / 6.6L / 7.5L
For 1970-1974 Pontiac Grand Prix 5.7L / 6.6L / 7.5L
For 1964-1973 Pontiac GTO 5.3L / 5.7L / 6.4L / 6.6L / 6.9L / 7.5L
For 1964-1977 Pontiac LeMans 5.3L / 5.7L / 6.4L / 6.6L / 7.0L / 7.5L
For 1964-1970 Pontiac Tempest 5.3L / 5.7L / 6.4L / 6.6L / 7.0L / 7.5L

Remark: Fit Models with 5.7L (350ci), 6.6L (400ci), 7.5L (455ci) Round 4 Port Engines ONLY, Does Not Fit D-Port Engines


All exhaust and suspension products are deemed for "off-road use only"- please check local laws regarding the modification of the exhaust systems by checking the vehicle code for your state. Many states are more stringent on exhaust modification laws and to pass SMOG. Please check your local laws.

All exhaust system components will alter and affect the vehicle's overall sound in pitch and volume. All to which is subjective in manner. we will not claim responsibility and/or accept returns based on an individual's personal preference.

Recommended for Racing/Off-Road Use ONLY, Will Not Pass Emissions Test

Product Content:

  • 1 Pair x Exhaust Header Manifold Kit (Left & Right)
    Hardware if any is shown in the picture above

Cross Reference Number:


The product does not come with manual/instruction, Professional Install Recommended

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