Coated Headers - Pontiac V8 326-455

Doug's Headers Coated Headers for Pontiac V8 326-455 are full-length, ceramic-coated exhaust manifolds engineered to unlock flow and performance on classic GM A-Body vehicles from 1964–1972. These headers feature 1.875-inch primary tubes that optimize scavenging across the Pontiac V8 displacement range, converging into a 3.5-inch collector for efficient exhaust exit. The ceramic coating protects against corrosion and heat while preserving underhood temperatures—a critical advantage in tight engine bays where radiant heat affects fuel systems and ignition components.

Constructed from steel and finished with high-temperature ceramic coating, these full-length headers replace the restrictive factory cast-iron manifolds that choke breathing on all displacement variants from the 326 through 455 blocks. The 1.875-inch primary diameter is sized to match the pulse characteristics of large-displacement Pontiacs without creating back-pressure peaks that rob mid-range torque. Installation includes all gaskets and hardware—no additional sourcing needed. At 42.3 lbs per pair, weight penalty is minimal compared to the exhaust velocity and thermal efficiency gains.

These headers are purpose-built for restomod builders, street performance enthusiasts, and Pontiac V8 restoration projects where maintaining originality conflicts with modern drivability demands. Whether tuning a Tempest, LeMans, or Grand Am for weekend cruising or weekend-warrior acceleration, full-length headers with collector efficiency unlock measurable gains in throttle response and peak output. The ceramic coating addresses a real challenge in vintage builds: managing underhood heat without sacrificing the aesthetic authenticity that makes these cars worth restoring.