Hooker Blackheart Series includes performance exhaust systems and components that are specially designed for popular late model vehicles. If you're looking for the perfect combination of style and quality, Hooker Blackheart Series is exactly what you need! The Blackheart Headers come with durable, but lightweight 18-gauge 304 stainless steel construction. They guarantee to provide extra horsepower and torque, as well as better throttle response.Specs:Blackheart Shorty Style Headers 1 7/8 in. Tube Size Stainless Steel Natural FinishThe Hooker line of Super Competition and Competition headers, mufflers and cat-back exhaust systems are the most complete and wanted on the market. Since the golden era of drag racing in the 1960, Hooker has helped more racers than any other header company. Hooker became part of Holley's family in 1999. California Residents: This product can expose you to chemicals which are known to the State of California to cause cancer or other reproductive harm.