JBA 6616S 1-3/4 in Primary Raw 409SS Long Tube Headers for 1964-1973 Ford Mustang (351W SBF)

Fits 1964-1973 Ford Mustang models equipped with a 351W Small Block Ford engine.

JBA long tube headers are engineered for significant performance gains and high-RPM efficiency. Constructed from raw 409 series stainless steel, these headers utilize a long-tube design that is proven to increase horsepower and torque across the entire powerband. Each header features large-diameter mandrel-bent tubing to maintain consistent exhaust velocity and proprietary JBA Firecone® merged collectors for superior scavenging and smooth flow.

Designed with performance and durability in mind, these headers provide maximum ground clearance to prevent dragging on lowered vehicles. The 3/8-inch thick one-piece flanges ensure a leak-free seal at the cylinder head, while oversized exhaust ports accommodate modified cylinder heads. This system includes integrated O2 sensor provisions for straightforward installation.

• Part Number: 6616S
• Primary Tube Diameter: 1-3/4 in
• Material: Raw 409 Stainless Steel
• Flange Thickness: 3/8 in CNC laser-cut one-piece
• Collectors: Patented JBA Firecone® merged design
• Mandrel-bent tubing for optimized exhaust flow
• Oversized exhaust ports and O2 sensor provisions included