These direct-fit performance tuned-length headers are available for full-size 5.3L/6.2L equipped GM truck & SUV models. Dyno-tested for maximum power improvements while allowing a direct bolt-on application these headers come in a standard high-temp titanium ceramic or optional polished ceramic finish.BBK Performance shorty headers are made from 1-3/4" CNC-machined mandrel bent tubing with 3/8" thick die-stamped flanges. The large diameter primary tube design creates unrestricted airflow for ultimate horsepower gains. These headers are pressure tested to ensure leak free performance.