Dusterhoff Racing Supercharger Upper Pulley Kit | 6.2L Supercharged Gen 3 HEMI

Unlock more performance from your 6.2L Supercharged Gen 3 HEMI with the Dusterhoff Racing Supercharger Upper Pulley Kit. Reducing the diameter of the upper supercharger pulley increases supercharger speed, allowing the factory blower to produce additional boost and move more air into the engine. When paired with the proper fuel system, cooling upgrades, supporting components, and custom calibration, an upper pulley upgrade can deliver a substantial increase in horsepower and torque. It is one of the most effective modifications for enthusiasts looking to take a factory-supercharged HEMI beyond stock performance.

Dusterhoff Racing offers multiple pulley sizes so the supercharger drive can be configured around the goals of the vehicle rather than using a one-size-fits-all approach. Pulley selection should take into account fuel type, desired boost level, vehicle application, existing modifications, and how the vehicle will be used. A street-driven Hellcat on pump gas may require a different combination than an E85-powered Trackhawk, TRX, or dedicated drag racing build. Having multiple pulley options gives owners and tuners the flexibility to build the combination correctly.

The kit’s modular design is also valuable as the vehicle evolves. Instead of treating the pulley as an isolated modification, it can become part of a complete performance package that includes upgraded injectors, improved fueling, colder spark plugs, a lower-temperature thermostat, supercharger cooling upgrades, and custom engine and transmission tuning. This allows the same basic supercharger system to support different performance levels as additional modifications are added.

Proper calibration is critical whenever supercharger speed and boost pressure are increased. A smaller upper pulley changes airflow, fueling requirements, ignition demands, and overall engine load, which means custom tuning is required to safely take advantage of the added performance. Depending on pulley size and fuel selection, additional supporting modifications may also be necessary. Selecting the correct combination helps maintain the drivability and consistency expected from a properly built Gen 3 HEMI.

This pulley kit is ideal for Hellcat, Redeye, Demon, Trackhawk, Durango Hellcat, and Ram TRX owners looking for a straightforward path to increased supercharger performance. It can be used on responsive street builds, flex-fuel combinations, E85 setups, and more aggressive track-focused vehicles. When combined with the correct belt setup and supporting modifications, the pulley helps deliver stronger acceleration and increased power throughout the usable RPM range.

For enthusiasts who want more than a random collection of performance parts, the Dusterhoff Racing Supercharger Upper Pulley Kit provides a strong starting point for a properly matched 6.2L HEMI combination. Choose the pulley size that fits your goals, pair it with the necessary supporting components and professional calibration, and build a supercharged HEMI package designed to deliver reliable, repeatable performance.

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Specifications & Features

• Brand: Dusterhoff Racing
• Product Type: Performance Supercharger Upper Pulley Kit
• Engine Compatibility: 6.2L Supercharged Gen 3 HEMI
• Vehicle Compatibility: Select Dodge Challenger SRT Hellcat, Dodge Charger SRT Hellcat, Challenger and Charger Hellcat Redeye, Dodge Challenger SRT Demon, Dodge Challenger SRT Super Stock, Jeep Grand Cherokee Trackhawk, Dodge Durango SRT Hellcat, and Ram 1500 TRX applications
• Year Compatibility: Application dependent
• Pulley Size: Multiple performance pulley sizes available
• Size Selection: Choose based on desired boost level, fuel, supporting modifications, and vehicle combination
• Material: Performance-grade machined metal construction
• Color: Black / Metallic, depending on selected components
• Weight: Varies by selected pulley configuration
• Designed to increase factory supercharger speed
• Increases boost pressure compared with the factory pulley configuration
• Supports increased horsepower and torque
• Modular design allows pulley changes as the performance combination evolves
• Suitable for pump gas, flex-fuel, and E85 combinations when properly configured
• Compatible with stock-style supercharger drive systems on applicable vehicles
• Supporting Modifications: Requirements vary depending on pulley size, fuel type, boost level, and vehicle
• Custom Engine Tuning Required: Yes
• Transmission Tuning: Recommended where applicable
• Fuel System Upgrades: May be required depending on pulley size and fuel
• Upgraded Injectors: May be required depending on performance level
• Spark Plug Upgrade: Recommended for increased-boost applications
• Belt Selection: Application and pulley-size dependent
• Intended Use: Street performance, drag racing, flex-fuel builds, E85 builds, high-horsepower applications, and complete Gen 3 HEMI power packages
• Installation Difficulty: Moderate to Advanced
• Professional Installation: Recommended
• Fitment Note: Verify pulley size, belt requirements, fuel system capacity, and tuning requirements for your exact 6.2L Supercharged HEMI combination before ordering