Fits select 2018-2024 Ford Mustang models, including GT, Bullitt, Mach 1, and Dark Horse.

The Kooks 8-inch Front O2 Extension Harness (CAS-109677-8) provides the necessary length to relocate oxygen sensors during long-tube header installations or custom exhaust modifications. Designed as a direct-fit solution, this harness allows you to extend the sensor reach without the risk of cutting, splicing, or damaging the factory wiring loom. Handcrafted in the USA, it ensures consistent signal integrity for accurate air/fuel ratio monitoring.

• Length: 8 inches
• Fitment: Front O2 sensor position
• Installation: Plug-and-play connectors, no splicing required
• Manufacturer Part Number: CAS-109677-8
• Handcrafted in the USA
• Backed by Kooks Limited Lifetime Warranty

Fits select 2019-2020 Ram 1500 (including Big Horn, Laramie, Longhorn, Limited, Lone Star, Rebel, Special Service, and Tradesman).

When upgrading to high-performance Kooks headers or custom exhaust systems, the O2 sensor bungs are often relocated further away from the factory wiring. This Kooks O2 extension harness solves the reach issue by providing an additional 12 inches of wire, ensuring your oxygen sensors can be connected securely without stressing the harness or requiring custom splicing.

Handcrafted in the USA, this harness features an OEM-style 4-pin flat connector for a true plug-and-play installation. Designed to withstand the high-heat environment of the engine bay, it maintains signal integrity for your engine management system while simplifying your header installation.

• Length: 12 inches
• Connector Type: 4-pin flat
• Handcrafted in the USA
• Plug-and-play installation; no cutting or splicing required
• Manufacturer Part Number: CAS-109264

Fits 2004-2009 Cadillac CTS-V, Pontiac G8 (Base, GT, GXP), and Pontiac GTO. This Kooks 12-inch O2 sensor extension harness is a critical component for long-tube header installations. When aftermarket headers relocate the oxygen sensor bungs further downstream from the engine, the factory wiring harness often lacks the length to reach. This plug-and-play extension bridges that gap, ensuring a secure connection without the need for cutting or splicing your vehicle's delicate electrical system.

• Length: 12 inches (approx. 304.8mm)
• High-temperature protective sleeving to withstand under-hood heat
• OEM-style connectors for a secure, weather-tight fit
• Eliminates the need for wire splicing during header installation
• Sold individually (Each)
• Manufacturer Part Number: CAS-109004
• Handcrafted in the USA

Fits 2016-2020 Chevrolet Camaro LT, LT1, SS, and ZL1 models.

Ensure your oxygen sensors maintain proper connectivity after installing long tube headers or custom exhaust components with the Kooks O2 Extension Kit. This kit is specifically engineered to bridge the gap when factory O2 sensor bungs are relocated, preventing the need for risky wire cutting or splicing. Each harness features OE-style connectors for a secure, plug-and-play interface with the factory wiring loom.

Constructed to withstand the high-heat environment of the exhaust tunnel, these extensions provide reliable signal transmission to the ECU. This specific kit provides the asymmetrical lengths required for the left side of the vehicle, ensuring a clean installation without excessive slack or tension on the connectors.

• Fits 2016-2020 Chevrolet Camaro (LT, LT1, SS, and ZL1)
• Direct plug-and-play installation using factory-style connectors
• One 10-inch front left extension wire
• One 8-inch rear left extension wire
• Designed for high-heat automotive applications
• Handcrafted in the USA
• Manufacturer Part Number: CAS-104326

Fits 2015-2020 Dodge Challenger SRT Hellcat/Demon/Redeye, Charger SRT Hellcat, and Jeep Grand Cherokee Trackhawk (V8-6.2L Supercharged).

When installing long-tube headers or performance exhaust systems, the factory oxygen sensor bungs are often relocated further downstream, making the original wiring harness too short to reach. These Kooks O2 sensor wiring extensions bridge that gap, providing a secure, plug-and-play connection without the need for cutting or splicing into your factory harness.

Handcrafted in the USA, these extensions maintain signal integrity for critical air/fuel ratio monitoring and ECU feedback. Designed to withstand the high-heat environment of performance engine bays, they ensure your engine management system receives accurate data even under race conditions.

• Direct plug-and-play installation into factory connectors
• No cutting, crimping, or soldering required
• Maintains precise O2 sensor signal for proper engine tuning
• Handcrafted in the USA
• Manufacturer Part Number: CAS-104322

Ensure a secure, leak-free connection for your high-performance exhaust system with the Kooks Headers & Exhaust Ball and Socket Bolt Kit (BK114). Specifically engineered for exhaust applications utilizing ball and socket joints, this hardware kit provides the clamping force necessary to maintain a tight seal under high heat and vibration.

This kit replaces or upgrades hardware on Kooks headers and mid-pipes, utilizing T304-grade steel components for durability. As with all Kooks products, this hardware is dyno and race-tested to meet the demands of street, track, and off-road environments. Every kit is handcrafted in the USA and includes a limited lifetime warranty to the original purchaser.

• Specifically designed for exhaust ball and socket connections
• High-strength T304 aircraft-quality steel construction
• Includes (4) M10 x 75mm Flange Bolts
• Includes (4) M10 Flange Nuts
• 100% Manufactured in the USA
• Manufacturer Part Number: BK114

Fits select 2005-2020 Chrysler 300, Dodge Challenger, Charger, Durango, Magnum, and Ram 1500, as well as Jeep Grand Cherokee and Wrangler/JK models.

Kooks BK111 header bolt kits provide a premium hardware solution for securing headers to Hemi or Modular cylinder heads. These bolts are engineered to replace worn or corroded factory hardware, ensuring a consistent seal that prevents exhaust leaks. Manufactured from T304 aircraft-quality stainless steel, this kit is designed to withstand the extreme heat cycles and harsh under-hood environments of high-performance street and race applications.

Each bolt features precision-rolled M8-1.25 threads and a 25mm length to ensure proper engagement and torque retention. Handcrafted in the USA and dyno-tested for reliability, these stainless fasteners offer superior corrosion resistance compared to standard grade-8 or OE bolts.

• Manufacturer Part Number: BK111
• Material: T304 Aircraft-Quality Stainless Steel
• Thread Pitch: M8-1.25
• Length: 25mm
• Quantity: 16 Bolts
• Proudly Manufactured in the USA
• Limited Lifetime Warranty to the original purchaser

Fits select 1967-2018 Buick, Cadillac, Chevrolet, GMC, Jeep, Oldsmobile, and Pontiac models equipped with LS-series engines.

Ensure your exhaust system remains leak-free with the Kooks Headers and Exhaust BK110 Locking Header Bolt Kit. Designed specifically for the high-vibration environment of LS-based engines, these bolts feature a specialized locking mechanism to prevent hardware from backing out during heat cycles. This solves the common issue of loose header flanges and protects your header gaskets from premature failure.

Manufactured in the USA from T304 aircraft-quality stainless steel, these fasteners offer exceptional strength and corrosion resistance, outperforming standard OE hardware. The 25mm length ensures proper thread engagement into the cylinder head while the M8-1.25 pitch provides a precise fit for factory and aftermarket LS heads.

• Product Line: Kooks Locking Hardware
• Material: T304 Aircraft Quality Stainless Steel
• Thread Size: M8 x 1.25
• Underhead Length: 25mm
• Quantity: Set of 12 bolts with locking tabs
• Engine Application: LS-based V8
• Manufacturer Part Number: BK110

Fits select 2010-2023 Ford F-150 and Mustang models (5.0L).

This Kooks BK109 Header Bolt Kit is designed to provide a secure, reliable seal between your high-performance headers and the cylinder head. These fine-thread fasteners are essential for ensuring even clamping force, preventing exhaust leaks that can lead to power loss and engine bay noise. Handcrafted in the USA, this kit is specifically engineered for the Ford 5.0L 4V Coyote engine architecture.

• Replaces worn or damaged OE manifold hardware with precision-engineered bolts
• Fine thread pitch (1.25mm) for increased clamping torque and vibration resistance
• Durable construction to withstand the high heat cycles of performance exhaust systems
• Manufactured in the USA by Kooks Headers and Exhaust

• Manufacturer Part Number: BK109
• Bolt Size: M10
• Thread Pitch: 1.25mm (Fine Thread)
• Length: 25mm
• Quantity: 16 Bolts
• Engine Fitment: 5.0L 4V Coyote

Kooks Universal 3.5-inch Stainless Steel Short Turnouts (9105) provide a durable, high-flow solution for directing exhaust gasses on performance and race applications. These turnouts are designed specifically to fit 3.5-inch collectors, measuring 6 inches in total length to provide adequate clearance and flow direction without excessive weight or bulk.

Constructed from T304 aircraft-quality stainless steel, these turnouts are engineered to withstand the high temperatures and corrosive environments common in racing and off-road use. Like all Kooks exhaust components, these turnouts are handcrafted in the USA and have been dyno-tested to ensure they meet the demands of high-performance engines. They provide a precise fit for standard 3.5-inch collectors, simplifying the final stage of your custom exhaust setup.

• Material: T304 Aircraft Quality Stainless Steel
• Inlet Diameter: 3.5 inches (3 1/2")
• Overall Length: 6 inches
• Application: Fits 3.5-inch collectors
• Construction: Handcrafted and 100% manufactured in the USA
• Testing: Dyno and race tested for maximum performance
• Manufacturer Part Number: 9105

Manage exhaust flow efficiently with Kooks Universal 3in Stainless Steel Short Turnouts. Designed for racing and high-performance applications where space is limited or specific exhaust direction is required, these turnouts are built to interface with 3-inch collectors. Every turnout is handcrafted in the USA using premium T304 stainless steel for superior corrosion resistance and durability under extreme exhaust temperatures.

Tested on the dyno and at the track, Kooks exhaust components are engineered to maintain flow integrity while directing heat away from critical chassis components. These 6-inch long turnouts provide a precise exit point for exhaust gases, ensuring your vehicle remains protected from direct heat exposure during high-load operation.

• Material: T304 Aircraft Quality Stainless Steel
• Inlet/Outlet Diameter: 3 inches
• Overall Length: 6 inches
• Compatibility: Fits universal 3-inch exhaust collectors
• Handcrafted in the USA
• Manufacturer Part Number: 9103

Fits select 1997-2024 Cadillac CTS-V, Chevrolet Camaro, Corvette, SS, Caprice PPV, and Pontiac G8, GTO, and Firebird.

Engineered by Kooks Headers and Exhaust, these high-performance 10mm spark plug wires provide superior conductivity and heat resistance for street, race, and off-road applications. Specifically designed to withstand the extreme under-hood temperatures often found in vehicles equipped with high-performance headers, this 8-piece set ensures consistent ignition delivery under the most demanding conditions.

Each wire features a heavy-duty 10mm diameter for maximum insulation and protection against cross-fire and voltage leaks. Finished in a distinctive orange with durable black boots, these wires are handcrafted in the USA to meet the needs of high-output LS and LT engine platforms.

• Wire Diameter: 10mm
• Color: Orange with Black Boots
• Quantity: 8-piece set
• Fitment: Select GM V8 models (1997-2024)
• Construction: Handcrafted in the USA
• Manufacturer Part Number: 750203

Fits select 1997-2024 Cadillac CTS-V, Chevrolet Camaro, Corvette, Caprice, SS, and Pontiac Firebird, G8, and GTO models.

Enhance your ignition system's reliability and conductivity with this Kooks 10mm Spark Plug Wire set. Engineered for high-output V8 applications, these heavy-duty 10mm wires provide superior insulation and minimize resistance to ensure a consistent, powerful spark even under the extreme heat conditions common in high-performance engine bays.

This handcrafted set features a professional grey wire finish with durable black boots, designed to withstand the rigors of street, race, and off-road environments. Proudly manufactured in the USA, Kooks ignition components are built to the same exacting standards as their world-class headers and exhaust systems to deliver long-lasting performance and a clean engine aesthetic.

• Wire Diameter: 10mm for maximum insulation
• Color: Grey wires with Black boots
• Quantity: Set of 8
• Handcrafted in the USA
• Direct fit for select GM V8 performance applications
• Manufacturer Part Number: 750202

Protect your ignition system from extreme under-hood temperatures with the Kooks Universal Spark Plug Sleeve Set. These heat shields provide a critical thermal barrier between your high-performance headers and spark plug boots, preventing the heat-soak, melting, and ignition misfires often caused by radiant exhaust heat.

Handcrafted in the USA, this set of eight sleeves is designed for universal application, ensuring compatibility with various wire diameters and boot angles across street, race, and off-road builds. The natural finish features the red Kooks logo, maintaining a clean look while providing the durability required for racing environments.

• Protects spark plug boots and wires from intense header heat
• Universal fitment for most spark plug boot configurations
• Natural finish with red Kooks logo branding
• Set of 8 sleeves included
• MPN: 750201
• Handcrafted in the USA
• Limited lifetime warranty to the original purchaser

This Kooks Universal 3-inch Ball and Socket connector is engineered for high-performance custom exhaust fabrication. Constructed from T304 aircraft-quality stainless steel, this male component provides a robust, leak-free connection for street, race, and off-road applications without the need for traditional gaskets. Each piece is handcrafted in the USA and designed to withstand the extreme thermal cycles and corrosive environments found in high-horsepower systems.

• 3-inch diameter ball and socket design for flexible, secure exhaust joints
• Manufactured from premium T304 stainless steel for corrosion resistance and durability
• Precision-formed for optimal fitment and flow in custom exhaust builds
• Dyno and race-tested to ensure performance under extreme conditions
• Independently owned and handcrafted in the USA
• Manufacturer Part Number: 7106S-MALE

Designed for custom exhaust fabrication and high-performance applications, the Kooks 3-inch Universal Ball and Socket connection provides a durable, leak-free solution for joining exhaust piping. This female-style connector is engineered to allow for necessary flexibility in the exhaust system, helping to absorb engine vibration and prevent stress-induced cracking of headers and downpipes.

Constructed from high-grade T304 aircraft-quality stainless steel, this component is built to withstand extreme temperatures and corrosive exhaust gases. Every Kooks product is handcrafted in the USA and undergoes rigorous dyno and race testing to ensure a precise fit and maximum reliability for street, track, or off-road use.

• Part Number: 7106S-FEMALE
• Diameter: 3-inch (76.2mm)
• Connection Style: Ball and Socket (Female)
• Material: Premium T304 Stainless Steel
• Design: Hand-built and dyno-tested for maximum flow
• Origin: Manufactured in the USA
• Warranty: Limited Lifetime Warranty to the original purchaser

The Kooks 2-1/2" Universal Ball and Socket connection provides a high-flow, leak-free joint for custom exhaust fabrication. Engineered for high-performance street and racing applications, this female-side socket component allows for slight angular misalignment without compromising the seal, making it superior to traditional flat flange gaskets in high-vibration environments.

• Manufactured from premium T304 aircraft-quality stainless steel for superior heat and corrosion resistance
• Designed for 2.5-inch diameter exhaust systems
• Precision-engineered for maximum power and a perfect fit
• Dyno and race tested for proven reliability in professional racing environments
• Handcrafted in the USA
• Manufacturer Part Number: 7105-AS-FEMALE
• Includes a limited lifetime warranty for the original purchaser

Fits select 1997-2015 Buick, Cadillac, Chevrolet, and Pontiac models equipped with GM LS-series engines.

This Kooks 1-7/8-inch LS1 exhaust flange is engineered for high-performance fabrication, providing a precise mounting surface for custom headers or exhaust manifolds. Constructed from aircraft-quality T304 stainless steel, this flange is designed to withstand extreme thermal cycles while resisting corrosion and warping. Each piece is handcrafted in the USA to ensure the tight tolerances required for a leak-free seal against the cylinder head.

• Manufacturer Part Number: 7046-AS
• Material: T304 Aircraft-Quality Stainless Steel
• Bore Size: 1-7/8 inch (47.625mm)
• Configuration: LS1/LS engine exhaust port flange (Bank)
• Handcrafted and 100% manufactured in the USA
• Limited lifetime warranty for the original purchaser

Designed for high-performance Small Block Ford applications, this Kooks Headers and Exhaust Adapter Plate Kit (7010-KIT) provides a precision-engineered interface for custom exhaust configurations. These adapter plates are handcrafted in the USA to ensure exact fitment and maximum exhaust flow for street, race, and off-road builds.

Constructed from T304 stainless steel, this kit is built to withstand extreme heat and the high-vibration environment of a racing engine. Each component is dyno and race-tested to verify performance and durability. This kit allows builders to adapt headers or manifolds to specific cylinder head configurations, solving clearance and mounting issues while maintaining a leak-free seal.

• Fits Small Block Ford engines
• Manufactured from T304 aircraft-quality stainless steel
• Handcrafted in the USA
• Dyno and race tested for performance reliability
• Designed for maximum power and durable sealing
• Manufacturer Part Number: 7010-KIT

Fits 2014-2016 Chevrolet Corvette Stingray models equipped with the GM Gen5 LT-1 engine.

Engineered for maximum exhaust scavenging and consistent power gains, these Kooks long tube headers feature 1-7/8 inch primary tubes specifically designed for the Gen5 LT-1 platform. Constructed from premium T304 aircraft-quality stainless steel, these headers are handcrafted in the USA to provide superior durability and precise fitment. By replacing restrictive factory manifolds, they optimize exhaust flow and performance for both street and track applications.

• 1-7/8 inch primary tube diameter for optimized exhaust flow
• Fabricated from high-grade T304 aircraft-quality stainless steel
• Dyno and race tested for proven performance results
• Handcrafted in the USA by a family-owned and operated specialist
• Limited lifetime warranty to the original purchaser
• Manufacturer Part Number: 70-024

Fits 2021-2023 Ram 1500 TRX and TRX Launch Edition (6.2L Supercharged V8).

Unlock the full power potential of your supercharged HEMI with Kooks 2-inch x 3-inch Long Tube Headers. These headers are engineered for maximum exhaust scavenging and flow, featuring 2-inch primaries that transition into high-velocity 3-inch collectors. This system includes Kooks H.O. (High Output) Green Connections, providing a high-performance link that bolts directly to the factory exhaust system.

Handcrafted in the USA from T304 aircraft-quality stainless steel, these headers are built to withstand the extreme temperatures and pressures of forced induction while resisting corrosion. Every system is dyno-tested and race-proven to deliver significant gains in both horsepower and torque. The bolt-on design ensures precise fitment to factory mounting points for a professional-grade installation.

• 2-inch primary tubes with 3-inch collectors
• 3-inch H.O. Green Connections for seamless OEM exhaust integration
• Fabricated from premium T304 stainless steel
• Includes all necessary gaskets and hardware for installation
• Handcrafted and manufactured in the USA
• Manufacturer Part Number: 3521H640

Fits 2021-2023 Ram 1500 TRX and TRX Launch Edition.

Maximize the exhaust flow and performance of your 6.2L Supercharged HEMI with Kooks Long Tube Headers. These headers are engineered with 1-7/8" primaries and 3" collectors to reduce backpressure and improve scavenging. This kit includes Kooks 3" x OEM H.O. Green Connection pipes, featuring high-output catalytic converters designed to integrate with the factory exhaust system while maintaining high-flow characteristics.

Handcrafted in the USA from T304 aircraft-quality stainless steel, these headers are built to withstand the extreme heat and stress of high-performance applications. Each system is dyno and race-tested to ensure precise fitment and maximum power gains. The bolt-on design utilizes high-quality materials to provide a long-lasting solution for street or off-road use.

• 1-7/8" primary tubes with 3" collectors
• 3" H.O. Green Connection pipes compatible with OEM exhaust
• Mandrel-bent T304 stainless steel construction
• Handcrafted in the USA
• Includes all necessary hardware for installation
• Manufacturer Part Number: 3521H440
• Limited Lifetime Warranty to the original purchaser

Fits 2019-2024 Ram 1500 models including Big Horn, Laramie, Limited, Lone Star, Rebel, and Tradesman (5.7L HEMI).

Unlock the full potential of your HEMI-powered truck with this premium Kooks exhaust system. These long tube headers feature 1-7/8-inch primary tubes and 3-inch collectors, engineered to significantly reduce backpressure and increase exhaust velocity compared to the restrictive factory manifolds. The system includes a 3-inch high-flow catted Y-pipe that connects to the OEM exhaust location, balancing performance gains with necessary emissions filtration.

Every Kooks component is handcrafted in the USA using T304 aircraft-quality stainless steel for superior corrosion resistance and longevity. Dyno and race-tested to ensure maximum power delivery, this kit (MPN 3520H420) is designed for a precise fit and reliable performance in street, off-road, or racing applications.

• 1-7/8" primary tubes with 3" collectors
• 3" x OEM high-flow catted Y-pipe
• Mandrel-bent T304 stainless steel construction
• Handcrafted in the USA
• Includes high-flow catalytic converters
• Backed by Kooks' Limited Lifetime Warranty
• Manufacturer Part Number: 3520H420

Fits select 2012-2023 Dodge Durango and Jeep Grand Cherokee SRT, SRT8, Trackhawk, and Hellcat models.

Maximize the performance of your HEMI-powered SUV with the Kooks Headers Long Tube Header and Green Catted Connection Pipe system. This high-flow exhaust solution is engineered to reduce backpressure and increase scavenging, delivering significant horsepower and torque gains across the RPM range. Handcrafted in the USA, this kit features Kooks' proprietary Green catalytic converters, designed to provide high-flow performance while meeting stringent emissions standards.

• Fabricated from premium T304 aircraft-quality stainless steel for maximum corrosion resistance
• Precision-engineered long tube primaries for optimized exhaust flow
• Includes Kooks "Green" High-Flow Catted Connection Pipes
• All systems are dyno and race tested to ensure maximum power delivery
• Handcrafted in the USA with 3/8-inch thick flanges
• Limited Lifetime Warranty for the original purchaser
• Manufacturer Part Number: 3410H631

Fits select 2012-2023 Dodge Durango and Jeep Grand Cherokee (6.4L).

Unlock the full power potential of your HEMI engine with Kooks Longtube Headers and Green Catted Connection Pipes. Handcrafted in the USA, these headers are specifically designed for maximum exhaust flow and performance gains. The system is constructed from high-quality T304 aircraft-grade stainless steel to ensure durability under extreme heat and pressure. The included high-flow Green catted connection pipes allow for a performance-oriented setup that integrates with your existing exhaust system.

• Material: T304 Aircraft-Quality Stainless Steel
• Primary Tube Diameter: 1-7/8in
• Collector Diameter: 3in
• Connection: Green Catted Connection Pipes with high-flow catalytic converters
• Handcrafted in the USA
• Dyno and race tested for proven performance
• Limited Lifetime Warranty for original purchaser
• Manufacturer Part Number: 3410H431

Authoritative Fitment:

• 2018-2021 Dodge Durango SRT
• 2022-2023 Dodge Durango SRT 392 (Plus/Premium)
• 2021, 2023 Dodge Durango SRT Hellcat (Plus/Premium)
• 2014-2021 Jeep Grand Cherokee SRT
• 2012-2013 Jeep Grand Cherokee SRT8
• 2018-2021 Jeep Grand Cherokee Trackhawk

Fits 2015-2023 Dodge Charger (Daytona 392, R/T 392, Scat Pack, SRT 392) and 2018-2020 Dodge Durango SRT.

Enhance the rear aesthetic of your Mopar with Kooks 2.75-inch OEM round exhaust tips. Finished in a durable black coating, these tips provide a refined, aggressive look that integrates seamlessly with your vehicle's factory styling. Each tip is handcrafted in the USA by Kooks Headers and Exhaust, ensuring professional-grade construction and a precise fit for your high-performance application.

• Tip Style: OEM Round
• Diameter: 2.75 inches
• Finish: Black Coating
• Construction: Handcrafted in the USA
• Manufacturer Part Number: 31524T10

Fits 2015-2023 Dodge Challenger and Charger models, including SRT Hellcat, Demon, Super Stock, Redeye, and Jailbreak (V8-6.2L SC).

Engineered for maximum exhaust flow and significant power gains, these Kooks long tube headers feature massive 2-inch primaries and 3-inch collectors. This system includes Kooks high-flow Green Catted connection pipes, specifically designed to bolt directly to your factory exhaust system for a seamless OEM connection while reducing backpressure.

Handcrafted in the USA from aircraft-quality T304 stainless steel, this header system is built to withstand extreme heat and racing conditions. Every Kooks product is dyno-tested to ensure optimal performance and a precise fit, replacing restrictive factory manifolds with a high-performance solution that carries a limited lifetime warranty.

• Primary Tube Diameter: 2 inches
• Collector Diameter: 3 inches
• Material: T304 Aircraft Quality Stainless Steel
• Includes High-Flow Green Catted OEM Connection Pipes
• 100% Manufactured in the USA
• Dyno and race tested for maximum power
• Manufacturer Part Number: 3103H640

Fits 2015-2023 Dodge Challenger and Charger SRT models (Hellcat, Demon, Redeye, Super Stock, and Jailbreak versions).

Maximize the exhaust flow and performance of your supercharged HEMI with the Kooks 2" x 3" Long Tube Header and Green Catted Connection Kit. Specifically engineered for high-output applications, these headers feature 2-inch primaries to handle the massive air volume of the SRT Hellcat and Demon engines, transitioning into 3-inch collectors for optimized scavenging. The included SRT8 Connection Kit features Kooks Green High-Flow Catalytic Converters, designed to provide a high-performance exhaust path while maintaining durability for street and track use.

Constructed from premium T304 aircraft-quality stainless steel, this system is handcrafted in the USA to ensure precise fitment and long-term resistance to corrosion. Every system is dyno and race tested to confirm power gains and structural integrity under extreme heat and pressure.

• Part Number: 3103H630
• Primary Diameter: 2 inches
• Collector Diameter: 3 inches
• Material: T304 Stainless Steel
• Includes Kooks Green High-Flow Catalytic Converters
• Hand-built in the USA
• Limited Lifetime Warranty to the original purchaser

Fits 2005-2023 Chrysler 300, Dodge Challenger, Dodge Charger, and Dodge Magnum.

Maximize the performance of your HEMI-powered platform with the Kooks 1-7/8" Header and Green Catted Connection Kit. This system replaces restrictive factory manifolds with mandrel-bent T304 stainless steel primaries, engineered to optimize exhaust scavenging and significantly increase airflow. The included "Green" connection kit features high-flow catalytic converters designed for high-output applications, providing a bridge between raw power and hardware reliability. Every system is dyno-tested and handcrafted in the USA to ensure precision fitment and long-term durability on the street or the track.

• Fabricated from T304 aircraft-quality stainless steel for superior corrosion resistance.
• 1-7/8" primaries designed for high-displacement 6.1L and 6.4L HEMI engines.
• Includes Kooks "Green" high-flow catted connection pipes for a complete install.
• Handcrafted in the USA and race-tested for maximum power delivery.
• Backed by a limited lifetime warranty to the original purchaser.

• Brand: Kooks Headers and Exhaust
• Part Number: 3101H430
• Primary Tube Diameter: 1-7/8 in.
• Material: T304 Stainless Steel
• Inlet Type: Green High-Flow Catalytic Converters
• Fitment Type: Vehicle Specific

Fits select 2005-2023 Chrysler 300, Dodge Challenger, Charger, and Magnum (V8-6.1L / 6.4L).

Maximize the performance potential of your HEMI-powered Mopar with this Kooks Headers and Exhaust kit. This system features 1 7/8-inch primary tubes designed for optimal exhaust flow and scavenging, feeding into 3-inch collectors. Constructed from T304 aircraft-quality stainless steel, these long-tube headers are built to withstand extreme heat and racing conditions without the risk of corrosion. The kit includes 3-inch stainless steel connection pipes equipped with high-flow catalytic converters, providing a complete path from the cylinder head to your factory or aftermarket cat-back system.

• T304 aircraft-quality stainless steel construction
• 1 7/8-inch primaries with 3-inch collectors
• 3-inch stainless steel connection pipes with high-flow catalytic converters
• Dyno and race-tested design for maximum horsepower and torque
• Handcrafted in the USA
• Manufacturer Part Number: 3101H420
• Backed by Kooks' Limited Lifetime Warranty to the original purchaser