American Racing Solutions Street Performance Belt Tensioner, 38 lb. Spring (6380) - 2008-2023 Hemi
Improve belt control and reliability on your street-driven HEMI with the American Racing Solutions HEMI Street Billet Belt Tensioner. Precision CNC-machined from 6061-T6 billet aluminum, this upgraded tensioner is designed for dependable daily driving and performance use on compatible 5.7L and 6.4L HEMI applications. Its custom-wound 38 lb. spring provides increased belt tension over a factory-style setup without stepping into the more aggressive spring rates used for dedicated race combinations.
The 38 lb. Street configuration is ideal for Challenger, Charger, Chrysler 300, Jeep Grand Cherokee, Dodge Durango, Ram 1500, and other compatible HEMI-powered vehicles that need stronger and more consistent belt control. A hardened steel shaft and heavy-duty bearings support demanding operation, while the anodized billet housing provides excellent strength, durability, and corrosion resistance.
American Racing Solutions offers several pulley configurations to match different belt-drive requirements, including 70mm and 63mm 8-rib smooth pulleys with either steel or ceramic bearings. A tensioner-only option is also available for customers who already have the appropriate pulley. This flexibility makes the 6380 a versatile upgrade for street-focused HEMI builds that demand better belt reliability and a stronger foundation for future performance upgrades.
Features
- Street-spec billet belt tensioner for compatible 5.7L and 6.4L HEMI applications
- Custom-wound 38 lb. street spring
- Designed for reliable street and daily driving performance
- CNC-machined from solid 6061-T6 billet aluminum
- Billet construction instead of cast aluminum
- Hardened steel tensioner shaft
- Heavy-duty bearing construction
- Anodized finish for increased durability and reduced belt wear
- Provides improved belt control compared to factory-style tensioners
- Helps reduce unwanted belt slip under demanding conditions
- Available with multiple pulley and bearing configurations
- Tensioner-only option available
- Direct replacement design for compatible applications
- Proudly made in the USA
Performance Benefits
- 38 lb. spring provides increased belt tension while maintaining street-friendly operation
- Helps maintain more consistent belt engagement during acceleration
- Supports dependable belt control at elevated engine speeds
- Billet aluminum construction provides excellent strength and machining precision
- Hardened steel shaft and heavy-duty bearings improve durability under load
- Multiple pulley options allow the setup to be tailored to compatible belt-drive configurations
- Ideal for modified street vehicles that need better belt control without a race-focused spring rate
Configuration Options
- 70mm 8-Rib Smooth Pulley with Steel Bearings - Default
- 70mm 8-Rib Smooth Pulley with Ceramic Bearings
- 63mm 8-Rib Smooth Pulley with Steel Bearings
- 63mm 8-Rib Smooth Pulley with Ceramic Bearings
- Tensioner Only - No Pulley
Specifications
- Product Type: Performance Belt Tensioner
- Series: Street
- Spring Rate: 38 lb.
- Material: 6061-T6 Billet Aluminum
- Manufacturing Process: CNC-Machined
- Shaft Material: Hardened Steel
- Available Pulley Diameters: 70mm or 63mm
- Pulley Configuration: 8-Rib
- Pulley Type: Smooth
- Available Bearing Options: Steel or Ceramic
- Part Number: 6380
- Country of Manufacture: USA
Fitment
- 2008+ Dodge Challenger 5.7L HEMI
- 2008+ Dodge Challenger 6.4L HEMI
- 2008+ Dodge Charger 5.7L HEMI
- 2008+ Dodge Charger 6.4L HEMI
- 2008+ Chrysler 300 5.7L HEMI
- 2008+ Chrysler 300 6.4L HEMI
- 2009-2021 Jeep Grand Cherokee 5.7L HEMI
- 2009-2021 Jeep Grand Cherokee 6.4L HEMI
- 2011+ Dodge Durango 5.7L HEMI
- 2011+ Dodge Durango 6.4L HEMI
- 2009+ Ram 1500 5.7L HEMI
- 2009+ Ram 1500 6.4L HEMI
- Additional Chrysler, Dodge, Jeep, and Ram vehicles equipped with compatible 5.7L or 6.4L HEMI engines
Additional Notes
- This is the Street version featuring a 38 lb. spring rate.
- The default configuration includes a 70mm 8-rib smooth pulley with steel bearings.
- 63mm pulley options are also available for compatible belt-drive configurations.
- Ceramic bearing upgrades are available for both pulley sizes.
- A tensioner-only configuration without a pulley is available.
- Verify engine, pulley diameter, belt routing, belt configuration, and vehicle compatibility before ordering.
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