Doug's Headers D376Y Tri-Y Header, 1-5/8 In, 67-74 Chevelle, CC

Doug's PASSENGER CAR HEADERS Tri-Y Metallic Ceramic Coated Header development and design is complex and requires a substantial amount of time and resources to do the job right! Many manufacturers are unwilling to make the commitment and instead offer compromised headers at lower prices. Doug's will not compromise performance, quality or fit to compete with inferior designs at cheap prices. Every Doug's header is tuned with the proper tube size and length to efficiently remove all the exhaust from each cylinder, reducing pumping losses resulting in a dramatic increases in horsepower and torque. Doug's headers are carefully developed on the vehicles they are intended to fit and are re-checked numerous times during the design and manufacturing process.

• 3/8" Thick machined flanges...no warping
• CNC mandrel bent tubes... accurate fit & better flow
• Tri-Y headers yield maximum power from off idle to 4500 RPM making them well suited for applications demanding maximum mid-range torque with maximum fuel economy
• Heavy 16 gauge tubing...longer life
• Tubes are pre-polished to remove scratches and the header isfinished with a Metallic Ceramic Thermal Barrier Coating polished to a high luster appearance offering corrosion and heat resistance up to 1400 degrees

• Doug's Headers D376Y 1 5/8" Tri-Y Header Chevrolet Chevelle Small Block Chevrolet 64-67 Metallic Ceramic Coating
• Tri-Y Design - Ceramic Coated
• Collector: 2 1/2
• Port: OVL
• Primary: 1 5/8 - 2
• Does not fit w/ power glide trans
• exc. states w/Calif. emission stds
• Fits D-Port heads
• req. left side AC bracket H7608.
• with A/C
• For Off-Road Use Only

• Doug's Headers D376Y 1 5/8" Tri-Y Header Chevrolet Chevelle Small Block Chevrolet 64-67 Metallic Ceramic Coating
• Tri-Y Design - Ceramic Coated
• Collector: 2 1/2
• Port: OVL
• Primary: 1 5/8 - 2
• Does not fit w/ power glide trans
• exc. states w/Calif. emission stds
• Fits D-Port heads
• req. left side AC bracket H7608.
• with A/C
• For Off-Road Use Only

1964-1967 Chevrolet Chevelle 4.6L/283 V8
1964-1967 Chevrolet Chevelle 5.3L/327 V8
1964-1967 Chevrolet El Camino 4.6L/283 V8
1964-1967 Chevrolet El Camino 5.3L/327 V8
1964-1967 Chevrolet Malibu 4.6L/283 V8
1964-1967 Chevrolet Malibu 5.3L/327 V8

Installation Instructions (PDF)