Doug's Headers D303Y-B 1 3/4" Tri-Y Header Chevrolet Truck Big Block Chevrolet 68-87 Hi-Temp Black Coating

Features & Benefits

• 3/8" thick machined flanges to prevent warping
• CNC mandrel bent tubes ensure accurate fit and better flow
• Heavy 16-guage tubing for longer life
• Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating

Doug's is the pioneering force behind the popular TRI-Y design for cars and trucks. The unique, shortend, paired primary tubes increase mid-range torque without sacrificing top end power. TRI-Y's are a great choice for daily drivers and heavy duty trucks looking to increase power from idle up to 4500 RPM while maintaining maximum fuel efficiency.

For the enthusiast who demands the best, Doug's Headers are not just components; they're a statement of excellence, a commitment to leading-edge performance, and a nod to the glory days of muscle cars and drag racing. Join the ranks of champions. Experience the unmatched quality and performance of Doug's Headers today.

Specifications

Finish	Hi-Temp Black Coating
Material	Steel
Design	Full-length
Primary Tubing Diameter	1.75 IN
Collector Port Diameter	2.5 IN
Port Shape	Round
Tube Wall Thickness	16 Gauge
Flange Thickness	0.375 IN
Collector Attachment	3-Bolt Flange
EGT Port	No
Oxygen Sensor Port	No
Gasket Or Seal Included	Yes
Mounting Hardware Included	Yes
Color	Black
Sheen Level	Matte