Kooks 1-7/8" x 3" stainless long tube headers for big-power GT500 builds — full-bore pulley swaps, heads/cams, or larger blowers where the 1-3/4" tube becomes the choke point. The 1-7/8" primary keeps the upper RPM range open on serious supercharged 4V builds. 304 stainless construction with 3/8" thick laser-cut flanges handles sustained high-output heat. Oval port, mandrel-bent primaries.
Fits 2011-2014 Ford Shelby GT500 (5.4L / 5.8L 4V). Requires a Kooks X-pipe or H-pipe to complete the exhaust connection. EGR fitting included for cars retaining factory emissions equipment.
Kooks Headers & Exhaust has been hand-building stainless headers and exhaust systems in Statesville, North Carolina since 1962. Every Kooks header is welded by experienced fabricators in the same shop where the company's racing legacy was built. 304 stainless construction handles supercharged heat and corrosion that destroys mild steel headers.
Includes PY-8034-AL gaskets, two (2) CAS-109203 oxygen sensor extensions, and all installation hardware. Pair with a Kooks GT500 X-pipe (PN 11423100) or H-pipe (PN 11423400) downstream.
