Doug’s Headers D590 – 1 3/4″ 4-Tube Full Length Header Pontiac GTO 326-455 68-72 Metallic Ceramic Coating

Headers – 1.75 in Primary – 3 in Collector – Gaskets / Hardware Included – Steel – Silver Ceramic-Metallic – Pontiac V8 GTO 1968-72 – Pair

Doug’s Long Tube Header 68-72 GTO 326-455 W/O EGR/A.I.R. 1 3/4″ Primary 3″ Collector Silver Ceramic Coated D590

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: 4 – This Product is considered a Replacement Part per CARB and EPA regulations for emissions compliance and is legal for sale and use on specified vehicles in all 50 states as stated in Manufacturers Application Guide and Installation Instructions.Finish: 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