Doug's Headers D590-SS: 304 Stainless Long Tube Header (FITS: 67-72 Pontiac GTO & LeMans & Tempest -1 3/4" Primary / 3" Collector)

• Finish: 304 Stainless Steel
• 3/8” thick 304 stainless machined flanges to prevent warping
• Long tube headers provide the greatest increases in horsepower and torque across the entire RPM spectrum
• FITS the Following Vehicles: (326-455 1 3/4" Primary / 3" Collector)

Iconic Doug’s Headers for top selling applications redefined in Stainless Steel. Superior resistance to rust and corrosion with an impeccable finish.

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 304 stainless machined flanges to prevent warping


• CNC 304 stainless mandrel bent tubes for an accurate fit and improved flow


• Precision formed long transition collectors and long tube design reduce backpressure and increase higher RPM horsepower


• Finish: 304 Stainless Steel


• Material: 304 Stainless Steel


• Design: Full-Length


• Primary Tubing Diameter: 1.75-inches


• Collector Port Diameter: 3.0-inches


• 1 3/4" Primary / 3" Collector


• Port Shape: D-port


• Tube Wall Thickness: 16 Guage


• Flange Thickness: 0.375-inches


• Collector Attachment: 3-Bolt Flange


• Oxygen Sensor Port: No


• Gasket Or Seal Included: Yes


• Mounting Hardware Included: Yes


• Grade Type: Performance


• Color: Silver


• Sheen Level: Satin

Header Fitment Note: Header applications are based on original engine and cylinder head port centerlines unless otherwise noted. Raised port cylinder heads will cause installation issues.

FITS the Following Vehicles: (326-455 1 3/4" Primary / 3" Collector)

• 1967 - 1972 Pontiac GTO w/Floor Shifter -Engine V8


• 1968 - 1972 Pontiac LeMans w/Floor Shifter -Engine V8


• 1968 - 1970 Pontiac Tempest w/Floor Shifter -Engine V8