BBK 4047 Performance Shorty Tuned Length Exhaust Headers with Titanium Ceramic Finish for 2014-2018 GM Truck 5.3/6.2LThese BBK Performance shorty tuned Length exhaust Headers are designed and constructed as direct fit replacements for all 14 18 Chevrolet GM 5. 3 6. 2 Full Size Truck applications. Each header is manufactured with 1 3 4 in. CNC mandrel bent tubing that offers unrestricted exhaust flow for increased horsepower and torque over factory OEM manifolds. BBK tuned Length headers offer improved scavenging waves for better combustion, which leads to improved