Exhaust Header Stainless Steel Headers Stainless Steel Headers 1 7/8 in. x 3 in. Long Tube w/O2 Extensions FEATURES: 100 Percent Manufactured In The USA Kooks Headers And Exhaust Make The Most Power In The Industry Kooks Products Are Made Of T304 Air Craft Quality Steel Kooks System Are Specifically Designed For Maximum Power Limited Lifetime Warranty To Original Purchaser Every Kooks Product Is Dyno And Race Tested Kooks Products Fit And Install The Best 3 Generations Being Family Owned And Operated Kooks Custom headers opened their doors in Statesville, NC in July of 2009. The shop consists of 45,000 square feet and is situated on over 11 acres of property. Kooks Headers is a family owned and operated company which has prided itself on making the highest, most horsepower production header and exhaust systems for over 45 years.