1-5/8 Headers - 99-03 Cobra 4.6L 4V

The 1-5/8 Headers for 1999–2003 Cobra 4.6L 4V engines by BBK Performance are an essential upgrade for automotive enthusiasts aiming to enhance exhaust flow and increase horsepower on Gen I modular Ford platforms. These headers are specifically designed for the naturally aspirated 4-valve 4.6L engine, addressing the limitations of factory manifolds that restrict performance across various RPM ranges.

Engineered with a primary tube diameter of 1-5/8 inches, these headers optimize exhaust velocity and reduce backpressure, tailored to the unique characteristics of the Gen I 4.6L engine. The mandrel-bent construction ensures smooth internal passages, while the stepped design enhances scavenging efficiency across different power zones, crucial for maximizing volumetric efficiency in naturally aspirated setups.

Cobra owners and builders of 4.6L 4V engines will find significant benefits from this upgrade, especially when paired with a quality cat-back exhaust system and proper tuning to unlock the full potential of 15–25 horsepower gains. Installation is straightforward, fitting all 1999, 2000, 2001, 2002, and 2003 Cobra models without complications.