Fits 5.7 L 345 cu. OE style ball socket collector connects to factory exhaust head pipe. Shorty design for power gain from idle to mid-range RPM. Fully mandrel bent tubes made of 16-gauge 304 stainless steel. Head flanges laser-cut from 3/8-inch thick steel plates. Flanges flattened by hydraulic press for precise and leak-free seal. Flanges chrome plated for corrosion resistance. Polished surface for extra protection against rusting.