BBK Shorty Tuned Length Headers for 99-04 GM Truck 4.8L/5.3L 1-5/8" CNC Mandr...

BBK Shorty Tuned Length Headers for 99-04 GM Truck 4.8L/5.3L Direct-fit performance — These BBK Shorty Tuned Length Headers are engineered as exact replacements for 1999–2004 GM Truck and SUV 4.8L and 5.3L engines. Built to deliver reliable power gains without complex modifications. Key Features 1-5/8" CNC mandrel-bent tubing for smooth, unrestricted exhaust flow and increased horsepower and torque over OEM manifolds. Tuned length design improves scavenging waves for better combustion, throttle response and potential fuel economy gains. 3/8" laser-cut flange adds rigidity and ensures a leak-free seal at the cylinder head. Precision welded & pressure tested — robotic and hand welding plus pressure testing for durability and real-world reliability. Finish options include Titanium Ceramic or Polished Silver Ceramic coatings for corrosion resistance and long-lasting appearance. Complete installation kit — headers ship with new gaskets, bolts and hardware for a straightforward swap. Important Installation Note On the passenger side, remove the factory OE doughnut gasket from the OEM manifold and reinstall it onto the BBK passenger-side header to ensure the mid-pipe aligns and seals correctly. Upgrade your GM truck with BBK tuned length shorty headers for a reliable, bolt-on power improvement, enhanced exhaust flow, and long-term durability.