Upgrade your vehicle's performance with the BBK 3515 Shorty Tuned Length Exhaust Headers, specifically designed for the 1997 to 2003 Ford F Series Trucks equipped with the 4.6L engine. These headers are crafted from high-quality 1-5/8 inch CNC mandrel bent tubing, ensuring optimal exhaust flow and significant increases in both horsepower and torque compared to factory OEM manifolds. With improved scavenging waves, these headers enhance combustion efficiency, translating to better performance and fuel economy. The BBK 3515 headers feature robust 3/8 inch laser cut flanges for added strength and a guaranteed leak-free fit, making installation straightforward and reliable. Each header is meticulously robotically and hand-welded, then pressure tested to withstand real-world conditions. Available in a sleek Titanium Ceramic finish, these headers not only improve your vehicle's performance but also add a touch of style. Included in the package are new exhaust header gaskets, header bolts, and all necessary hardware for a complete installation. Perfect for enthusiasts seeking a performance edge, these headers are 50 State Legal and CARB Approved. <b>Features:</b> * Direct fit replacement for 97-03 Ford 4.6L F150 Truck and Expedition: Direct fit replacement for 97-03 Ford 4.6L F150 Truck and Expedition * 1-5/8 inch CNC mandrel bent tubing for unrestricted exhaust flow: 1-5/8 inch CNC mandrel bent tubing for unrestricted exhaust flow * Improves horsepower and torque over factory OEM manifolds: Improves horsepower and torque over factory OEM manifolds * Enhanced scavenging waves for better combustion: Enhanced scavenging waves for better combustion * 3/8 inch laser cut flange for strength and leak-free fit: 3/8 inch laser cut flange for strength and leak-free fit * Robotically and precision hand welded: Robotically and precision hand welded * Includes new exhaust header gaskets, bolts, and hardware: Includes new exhaust header gaskets, bolts, and hardware * Available in Titanium Ceramic or polished silver ceramic coated finish: Available in Titanium Ceramic or polished silver ceramic coated finish * 50 State Legal and CARB Approved: 50 State Legal and CARB Approved * 1-Year manufacturer's warranty with optional extended warranty: 1-Year manufacturer's warranty with optional extended warranty