BBC Headers - 58-64 Passenger Cars

The Hedman Big Block Chevy Headers for 58-64 passenger cars deliver the performance fundamentals serious engine builders expect from a purpose-built exhaust manifold. Designed to fit GM A-Body and B-Body vehicles from 1958 through 1964, this pair of street headers features 1.75-inch primary tubes that flow into a 3-inch collector, optimizing exhaust scavenging for naturally aspirated big block Chevy engines. The stepped primary diameter minimizes backpressure while maintaining velocity through the entire power band, translating to measurable gains in mid-range torque and peak horsepower on the dyno.

Construction is heavy-gauge steel with a factory black paint finish, protecting against thermal stress and corrosion common to street-driven classic cars. The header assembly comes complete with gaskets and mounting hardware, eliminating sourcing delays on restoration or modification projects. Weight of 34 pounds per pair reflects the robust tubing required to handle big block combustion pressures without flex or resonance issues. The 3-inch collector exit accommodates modern muffler systems or race-style exhaust tuning depending on your build goals.

Restoration enthusiasts and engine builders restoring or upgrading first-generation A-Body and B-Body chassis will find these headers essential for extracting performance from a big block platform while maintaining OEM-correct appearance under the hood. The 1.75-inch primary sizing balances street manners with highway cruising efficiency, avoiding the excessive scavenging losses common to oversized street manifolds. Fitment is engineered for 1958–1964 Chevrolet passenger car specifications, ensuring straightforward installation without frame modification.

Hedman has built a reputation in the custom exhaust market for delivering headers that balance bolt-on convenience with genuine performance gains. This design reflects decades of feedback from builders working with big block Chevy platforms in street and mild performance applications.