Headers for LS In 70-81 F-Body 1.875in Uncoated

The Headers for LS in 70-81 F-Body 1.875in Uncoated (MPN 45157) are designed for automotive enthusiasts aiming to enhance the performance of an LS engine swap into classic first-generation Pontiac F-Body platforms. These headers serve as a bolt-on exhaust solution, making them ideal for street machines, weekend track cars, or restoration projects that incorporate modern power into vintage chassis.

Constructed from high-temperature steel with a primary tube diameter of 1.875 inches, these uncoated headers are engineered to maximize exhaust scavenging efficiency while maintaining structural integrity under high heat conditions. The stepped primary runners are tuned to optimize exhaust gas velocity across a broad RPM range, which is essential for both naturally aspirated and boosted LS applications.

These headers are particularly beneficial for builders performing LS engine swaps into 1970–1981 Pontiac Firebirds, Grand Ams, Venturas, and Astras, providing a reliable fit with minimal modifications required. Their design helps manage underhood temperatures during aggressive driving, making them a practical choice for high-performance applications.