Kooks 1151H642 2" Stainless Long-Tube Headers & H.O. Green Cat Kit 15-24 F

Vehicle Fitment

• 2015-2024 Ford Mustang GT / GT Premium / Bullitt / Mach 1 / Dark Horse (5.0L 4-valve Coyote V8)

Features

• 304 stainless steel long-tube headers with 2.00" mandrel-bent primaries for maximum flow
• 3/8"-thick laser-cut flanges, dual bolt-pattern header flange for precise fitment
• Includes high-output GREEN catalytic connection pipes (EPA-verified high-flow cats)
• 3.00" collectors with Kooks "scavenging spike" design for improved exhaust scavenging and flow
• Comprehensive kit - includes gaskets, O2 sensor extension harnesses (for pre-2018 and 2018+ cars), clamps and bolt kits required for installation
• No custom fabrication required - bolt-on installation using factory bolt locations and exhaust layout
• Supports high-power builds - rated by manufacturer for high-output and forced-induction applications (as per vendor statements):contentReference[oaicite:1]{index=1}
• Made in USA, handcrafted - typical of Kooks Headers' quality for street, strip, or performance builds:contentReference[oaicite:2]{index=2}

Specifications

• Tube Diameter: 2.00" primaries
• Collector Size: 3.00" with GREEN high-flow catalytic connection
• Material: 304 stainless steel
• Finish: Raw stainless steel (polished / mirror depending on version):contentReference[oaicite:3]{index=3}
• Compatibility: Fits 5.0 L 4-valve Coyote V8 in 2015-2024 Mustang GT / GT-variants / Bullitt / Mach 1 / Dark Horse (check exhaust layout and emissions laws if applicable):contentReference[oaicite:4]{index=4}
• Included: Headers, connection pipes with catalytic converters, necessary hardware, gaskets, O2-sensor harnesses where required:contentReference[oaicite:5]{index=5}

Included Components

• 1x Left long-tube header (stainless steel)
• 1x Right long-tube header (stainless steel)
• 1x Pair of GREEN high-flow catted connection pipes / adapters
• 1x Set of gaskets, clamps, O2-sensor extension harness(es) (as required by year), and header bolt kit

Product Description

The Kooks 1151H642 long-tube header kit is a premium performance exhaust solution for 2015-2024 Ford Mustang GT (and related 5.0 L 4-valve variants). Crafted from 304 stainless steel with 2.00" mandrel-bent primaries and thick laser-cut flanges, this kit is designed to maximize exhaust flow, improve scavenging, and unlock increased horsepower and torque - especially under high-performance or high-output conditions.

The included high-flow GREEN catalytic connection pipes (with upgraded catalysts) help maintain street-legality in many regions while still offering the performance gains associated with aftermarket exhaust systems. Because the kit uses the stock bolt pattern and exhaust layout, installation is bolt-on and no custom fabrication is required - ideal for enthusiasts upgrading from stock exhaust or previous aftermarket setups.

Whether you're building a naturally aspirated 5.0 L Coyote Mustang for street / strip use, or preparing a high-power build that demands robust exhaust flow, Kooks 1151H642 offers a strong balance of durability, performance, and compatibility. As always, verify local emissions regulations before installation if you plan on using the vehicle on public roads.