Doug’s Headers D564 – 1 3/4″ 4-Tube Full Length Header Pontiac GTO 326-455 64-67 Metallic Ceramic Coating

Headers – Full Length – 1.75 in Primary – 3 in Collector – Gaskets / Hardware Included – Steel – Ceramic – Pontiac V8 – GM A-Body 1964-67 – Pair

Doug’s Long Tube Header 64-67 GTO 326-455 1 3/4″ Primary 3″ Collector Silver Ceramic Coated D564

Long tube headers provide the greatest increases in horsepower and torque across the entire RPM spectrum. The choice of racers worldwide, Doug’s long tube headers are designed for the car owner who wants maximum power and the highest quality header on the market.

• 3/8″ Thick machined flanges to prevent warping
• Precision formed long transition collectors and long tube design reduces backpressure and increases higher RPM horsepower
• Heavy duty 16-gauge tubing for long life
• Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating

Collector Attachment: 3-Bolt FlangeCollector Diameter: 3.0Collector Port Diameter: 3.0Color: SilverCylinder Head Port Shape: D-portDesign: Full-lengthEGT Port: NoEmissionFullDES: 2 – This product is Legal for use on Pre-Pollution Controlled Vehicles. It is legal for use on all vehicles produced Before Emissions Control Regulations were imposed. These are considered Uncontrolled Vehicles and are defined as follows; 1965 and Older US Manufactured California Certified Vehicles, 1967 and Older US Manufactured Federally Certified Vehicles, 1967 and Older Foreign Manufactured VehiclesFinish: Metallic Ceramic CoatedFlange Thickness: 0.375Gasket Or Seal Included: YesGaskets Included: YesGrade Type: PerformanceHeader Material: SteelHeader Style: Full-lengthMaterial: SteelMounting Hardware Included: YesOxygen Sensor Port: NoPort Shape: D-portPrimary Tube Outside Diameter: 1.75Primary Tubing Diameter: 1.75Sheen Level: Semi-GlossTube Wall Thickness: 16