Kooks Headers 1151H222 1-3/4" Stainless Long Tube Headers & Catted Connection Kit

The Kooks Headers 1151H222 is a complete 1-3/4" x 3" stainless steel long tube header and catted connection pipe kit engineered for the 2015–2024 Ford Mustang GT and Dark Horse 5.0L 4V Coyote engine. Designed and handcrafted in the USA, this kit delivers a true bolt-on performance upgrade with no additional parts required for installation.

Kooks constructs this kit using T304 aircraft-quality stainless steel, ensuring exceptional corrosion resistance and the ability to withstand extreme exhaust temperatures. The 3/8" thick laser-cut flanges provide a precision fit, while the 2" mandrel-bent primaries promote smooth, unrestricted exhaust gas flow for maximum power output. The 3" collectors feature Kooks' patented scavenging spike design to further optimize exhaust scavenging and boost engine efficiency.

The catted connection pipes include Kooks Performance 400-cell high-flow catalytic converters, striking an ideal balance between emissions compliance and performance flow. OEM adapters are included to interface directly with the factory cat-back exhaust system. Note: Performance cats are not intended for use on forced induction applications.

Key Features:

• T304 aircraft-quality stainless steel construction throughout
• 3/8" thick precision laser-cut header flanges
• 1-3/4" mandrel-bent primary tubes with 3" collectors
• Kooks' patented scavenging spike collector design
• Dual bolt pattern header flange for added compatibility
• Kooks Performance 400-cell high-flow catalytic converters
• Includes gaskets, oxygen sensor extension harness, clamps, and bolt kit
• OEM adapters included — connects directly to factory cat-back exhaust
• No additional parts required for installation
• Manufactured in the USA
• Backed by Kooks' Limited Lifetime Warranty to the original purchaser
• Dyno and race tested for maximum power gains

Kooks Headers has been a leader in high-performance exhaust manufacturing since 1962, earning championships across NHRA, NMRA, NMCA, NASCAR, and many other sanctioning bodies. This kit is the ideal choice for Mustang GT owners seeking proven performance gains backed by decades of racing heritage.