Kooks 1-3/4" x 3" stainless long tube headers for the stock to lightly modified S550 / S650 Coyote. The 1-3/4" primary broadens the torque curve and opens up the top end without giving up daily drivability — the sweet-spot sizing for a daily-driven 5.0L Mustang. 304 stainless construction with 3/8" thick laser-cut flanges resists warping under heat cycling. Mandrel-bent primaries preserve flow through every curve.
Fits 2015-2026 Ford Mustang GT with the 5.0L 4V Coyote. Requires a Kooks X-pipe, H-pipe, or 3" connection adapter to complete the exhaust connection. Round port, stock bolt pattern bolts directly to S550 / S650 Coyote cylinder heads.
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 roots were established. 304 stainless construction handles thermal cycling and corrosion.
Includes 755392 gaskets, one (1) CAS-105979 O2 sensor extension for 2015-2017 cars, additional CAS-109677-style extensions as required, and a complete bolt kit. Pair with Kooks Coyote connection pipes (PN 11513100), ULTRA X-pipe (PN 11513700-2), or 3" connection adapters (PN 11513010 / 11513030).
