Circle D Transmission’s Level 3 6L80 Performance Parts & Kits are engineered for drivers seeking superior performance and reliability. Designed for high-powered vehicles, these kits offer enhanced durability and efficiency, making them ideal for both street and track applications. With high-quality components, including advanced clutch kits and billet shafts, Circle D Transmission ensures your 6L80 transmission maintains optimal power delivery and longevity. Whether you’re rebuilding, replacing, or upgrading, these kits provide the perfect fit and performance boost for your vehicle.
Circle D Transmission’s 6L80 clutch kits are designed to enhance shifting, durability, and overall performance, making them ideal for both street and track use. These kits include high-performance clutches, steels, and other transmission parts that improve power transfer and drivability. They are perfect for rebuilding or upgrading 6L80 transmissions and are compatible with most models, ensuring a precise fit and optimal results. Circle D Transmission sells these kits directly through their shop and authorized dealers, offering genuine, high-quality components. Additionally, billet shafts included in some kits increase strength and power transfer, providing enhanced reliability and performance under heavy loads. These upgrades allow drivers to maximize their vehicle’s potential while maintaining durability and drivability.
Browse the categories below to find the perfect 6L80 performance parts and kits for your vehicle.
Rated up to 750 RWHP. HP ratings are contingent on numerous factors, such as tune, vehicle weight, power adder, use, etc.
Detailed Instructions Included | FREE UPS Ground to the contiguous United States (lower 48)
The 6L80 Transmission Rebuild Kit is designed with 45-tooth 4-5-6 clutch plates. Circle D Transmission's billet 4-5-6 clutch hub and intermediate shaft (CDT part number 104680-45) are included in this kit. The 4-5-6 clutch pack provides 50% more surface area than a stock clutch set-up, and the 3-5-R clutch pack offers 50% more clutch area than stock.
Includes all 5 Clutch Kits | Detailed Instructions Included |FREE UPS Ground to the contiguous United States (lower 48)
Kit is designed with 45 tooth 4-5-6 clutch plates. This clutch pack provides 50% more surface area than a stock clutch set up. CDT's Billet 4-5-6 clutch hub and intermediate shaft (CDT part number 104680-45-P) is required in order to use this clutch pack. The clutch hub and intermediate shaft are not included in this kit. The 3-5-R clutch pack offers 50% more clutch area than stock.
Detailed Instructions Included | FREE UPS Ground to the contiguous United States (lower 48)
This clutch kit is designed with 45-tooth 4-5-6 clutch plates for enhanced performance. It includes CDT’s Billet 4-5-6 clutch hub and intermediate shaft (CDT part number 104680-45), ensuring durability and reliability. With 50% more surface area than a stock clutch setup, this kit delivers improved power transfer and longevity. Shop now for a high-quality upgrade to your transmission system!
Detailed Instructions Included | FREE UPS Ground to the contiguous United States (lower 48)
The required 45-tooth clutch plates are not included with this product and must be purchased separately. This billet shaft is designed specifically to work with 45-tooth clutch plates, ensuring optimal performance and durability in high-powered applications. For best results, pair this clutch kit with high-quality clutch components that match your vehicle’s needs.
Detailed Instructions Included | FREE UPS Ground to the contiguous United States (lower 48)
This transmission clutch kit is designed to work with 45-tooth 4-5-6 clutch plates, providing a 50% increase in surface area compared to a stock clutch setup. To use this clutch pack, the CDT Billet 4-5-6 clutch hub and intermediate shaft (CDT part number 104680-45-P) are required. Please note that the clutch hub and intermediate shaft are not included in this kit and must be purchased separately for proper installation and performance.
Detailed Instructions Included | FREE UPS Ground to the contiguous United States (lower 48)
This 3-5-R clutch pack offers 50% more clutch surface area than stock, making it an ideal upgrade for enhancing the performance and longevity of 6L80 transmissions. Designed for automatic transmission systems where clutch shifting precision is critical, this high-performance pack is engineered to handle increased power and torque without compromising durability. The increased friction material improves transmission performance under heavy load conditions and aggressive driving styles, helping your car maintain optimal shift quality and responsiveness.
Built from the highest-quality material, the pack includes components that are identical in dimension to OEM parts, ensuring the correct fit upon install. Whether you’re working on performance vehicles or replacing a worn-out shaft assembly in a daily driver, this clutch pack is designed to be a virtually seamless upgrade that can be replaced with confidence. When paired with a properly functioning transmission control module, the system maintains full control over shift timing and pressure for smooth, consistent engagement.
This clutch pack features advanced heat and wear resistance to reduce trouble associated with high-load conditions, extending the overall life of the transmission. For automotive enthusiasts and technicians aiming to achieve greater reliability and performance from their 6L80 transmission, this is a must-have component.
FREE UPS Ground to the contiguous United States (lower 48) | NO core required
Engineered for extreme applications, this drop-in component is ideal for nitrous-assisted or heavy vehicles producing over 750 rear-wheel horsepower. It’s manufactured from 4140 HTSR steel, a heat treated, hot rolled alloy known for its exceptional hardness and high strength. The material offers superior mechanical properties, making it well-suited for high-stress automotive environments, particularly in high-horsepower trucks, SUVs, and performance platforms like the CTS-V.
The 4140 HTSR material ensures outstanding wear resistance, especially in driveline systems exposed to intense heat and mechanical stress. Its ability to resist stress fractures and maintain structural integrity under heavy loads makes it ideal for demanding applications where failure is not an option. The high strength and hardness of this steel enhance component longevity and operational reliability in both racing and off-road use cases.
Engineered to meet or exceed OEM specifications, this part is often used in applications involving custom gears, performance bolts, and torque-transmitting assemblies where both resistance to deformation and dimensional stability are critical. With unmatched ability to perform in extreme conditions, it’s the trusted solution for builders and fabricators seeking top-tier metallurgy and precision.
