Header Style: ShortyHeader Material: Stainless steelHeader Finish: NaturalPrimary Tube Diameter (in): 1 3/4 in.Collector Attachment: Ball and socket flangeCollector Diameter: 2.500 in.Tuned: NoPrimary Tube Gauge: 14-gaugeFlange Style: StandardFlange Thickness (in): 3/8 in.Bolts/Studs Included: YesGaskets Included: YesReducers Included: YesY-Pipe Included: NoMotor Mounts Included: NoTransmission Mount Included: NoQuantity: Sold as a pair.Headers, Cat4ward, Stainless Steel, Natural, PairIncreased horsepower and torque for all 50 states. Bolt on extra horsepower and torque with 50-state smog legal JBA Cat4ward headers. These headers are designed to last, with 3/8 in. thick laser-cut flanges, smooth mandrel-bent tubing, and JBA's patented Firecone collectors. Available in either 14-gauge steel or 409 stainless steel, these headers are offered in your choice of chrome plated or high-temperature silver ceramic finishes for most applications. JBA includes high-quality mounting hardware and instructions, and best of all, most applications simply bolt on without any additional exhaust modifications.