1-5/8 Swap Headers - SBF 351W Titanium

The 1-5/8 Swap Headers – SBF 351W Titanium from BBK Performance are purpose-built exhaust manifolds engineered for serious engine builders and performance enthusiasts running small-block Ford 351W powerplants. Whether you're swapping a 351W into a classic muscle car, street rod, or modern restomod, these headers deliver the scavenging efficiency and heat management required for reliable high-output builds. The 1-5/8-inch primary tube diameter strikes the ideal balance between low-RPM response and peak horsepower potential for naturally aspirated and moderately boosted applications.

Constructed from titanium, these headers offer exceptional durability and thermal efficiency compared to conventional cast-iron or steel alternatives. Titanium's superior heat resistance reduces underhood temperatures and minimizes radiant heat transfer to sensitive engine bay components—a critical advantage in tight swap installations or vehicles with limited cooling capacity. The 1-5/8-inch primary tube sizing optimizes exhaust gas velocity and cylinder scavenging across the entire RPM band, promoting cleaner, more efficient combustion while supporting increased airflow through a matched intake and fuel system. BBK's precision mandrel-bent construction ensures smooth, consistent tube bends that eliminate turbulence and flow restrictions inherent in poorly designed or cast headers.

These headers are ideal for 351W engine swaps into Fox-body Mustangs, older F-Series trucks, and vintage Broncos where factory exhaust packaging conflicts with modern performance engines. Proper header selection is non-negotiable in swap builds—mismatched tube sizing and poor scavenging characteristics will waste horsepower and compromise reliability. Installation requires custom exhaust fabrication downstream and careful mockup to ensure ground clearance and heat shielding near fuel lines and brake components. Pair these headers with a quality cat-back exhaust system and professional tuning to maximize the breathing improvements and unleash the full potential of your 351W swap.