Kooks Headers and Exhaust has been the leader in the High Performance Exhaust Industry for over 50 Years! Since 1962, Kooks takes pride in offering the best Headers and complete exhaust systems for your street, race and off-road applications. We have won hundreds of championships and set countless records in the NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, SCCA and many other racing organizations. Now with three generations of family leadership, we are proud to say that all of our products are handcrafted here in the USA and we are proud to still be independently owned and operated. And don't forget, "Get Kookin with KOOKS!"

• 100 Percent Manufactured In The USA
• 3 Generations Being Family Owned And Operated
• Every Kooks Product Is Dyno And Race Tested
• Kooks Headers And Exhaust Make The Most Power In The Industry
• Kooks Products Are Made Of T304 Air Craft Quality Steel
• Kooks Products Fit And Install The Best
• Kooks System Are Specifically Designed For Maximum Power
• Limited Lifetime Warranty To Original Purchaser
• Manufactured In The USA. Kooks Uses T304 Aircraft Quality Stainless Steel. Kooks Products are Backed by a Limited Lifetime Warranty To the Original Purchaser. Kooks Products Are Dyno And Race Tested and Designed For Maximum Power.

2015-2026 Mustang GT/Dark Horse 5.0L 4V 1-7/8" x 3" Stainless Headers w/ULTRA GREEN Catted Connection Pipes and OEM Adapters. 304 Stainless Steel Construction 3/8" Thick Laser Cut Flanges1-7/8" Mandrel Bent Primaries3" Collectors with Kooks' Patented Scavenging SpikeDual Bolt Pattern Header Flange Kooks ULTRA GREEN Cats EPA verified 400 Cell High Flow Catalytic ConvertersKooks ULTRA GREEN Cats are engineered to perform in Modern Muscle cars making up to 850 RWHPIncludes Gaskets, Oxygen Sensor Extension Harness, Clamps, Bolt Kit, and O2 Spacers for Installation. No additional parts required.