Doug's Headers D3373-B Long Tube Exhaust Headers Black Coated 2WD/4WD Truck

Doug's Headers D3373-B long tube exhaust headers feature high-temperature black coating for 2WD and 4WD truck applications. Engineered for maximum performance and durability, these headers are precision-designed to deliver significant gains in horsepower and torque across the RPM range.

Premium Construction Features:

• 3/8-inch thick laser-cut flanges prevent warping and ensure lasting seal integrity
• CNC mandrel-bent tubes maintain consistent diameter for accurate fitment and optimal exhaust flow
• Heavy-duty 16-gauge steel tubing construction for extended service life
• Precision-formed long transition collectors with long tube design reduces backpressure
• High-temperature black ceramic coating protects against corrosion and heat

Performance Benefits:

• Tuned tube sizing and length efficiently evacuate exhaust gases from each cylinder
• Reduced pumping losses deliver dramatic increases in horsepower and torque
• Long tube design maximizes high-RPM power output
• Improved throttle response throughout the power band

Every Doug's header undergoes extensive development on the actual vehicle platform, with multiple quality checks during design and manufacturing to ensure precise fit and uncompromising performance. These headers represent a true performance upgrade engineered without shortcuts or compromises.