American Racing Solutions Billet Belt Tensioner, 40 lb. Street (9740) - 2005-2010 Mustang GT
Improve belt control and reliability on your 2005-2010 Ford Mustang GT 4.6L with the American Racing Solutions Street Billet Belt Tensioner. Designed for street-driven and daily-driven performance applications, this upgraded tensioner features a custom-wound 40 lb. spring that provides increased belt tension compared to the factory tensioner without moving to the more aggressive spring rate of a dedicated race setup.
Precision CNC-machined from solid 6061-T6 billet aluminum rather than cast material, the ARS tensioner delivers the strength, accuracy, and durability required for upgraded Mustang belt-drive systems. A hardened steel shaft and heavy-duty bearings provide additional durability for demanding performance use, while the anodized finish helps protect the tensioner and reduce belt wear.
The 40 lb. Street configuration is an excellent choice for Mustang GT owners who want improved belt control and reliability while retaining a setup intended for regular street use. For supercharged combinations, maintaining more consistent belt tension can help reduce unwanted belt slip and support more reliable performance as engine speed and belt-drive loads increase.
Features
- Street-spec performance belt tensioner for 2005-2010 Mustang GT applications
- Designed for 4.6L Modular engine applications
- Custom-wound 40 lb. street spring
- Provides improved belt tension compared to the factory tensioner
- Designed for street-driven and daily-driven performance builds
- 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
- Helps reduce unwanted belt slip in compatible performance applications
- Engineered for dependable operation at elevated engine speeds
- Direct bolt-on replacement design
- No adapter plates or additional accessories required
- Proudly made in the USA
Performance Benefits
- 40 lb. spring provides increased belt control while remaining street focused
- Helps maintain more consistent belt tension during acceleration
- Can reduce unwanted belt slip in compatible supercharged applications
- Provides improved belt-drive reliability compared to the factory tensioner
- Billet aluminum construction combines excellent strength with precision machining
- Hardened steel shaft and heavy-duty bearings are designed for demanding performance use
- Street-oriented spring rate makes this tensioner suitable for performance Mustangs that see regular road use
Configuration Options
- 76mm 8-Rib Smooth Pulley with Steel Bearings - Default Configuration
- 76mm 8-Rib Smooth Pulley with Ceramic Bearings
- Tensioner Only - No Pulley
Specifications
- Product Type: Performance Belt Tensioner
- Series: Street
- Spring Rate: 40 lb.
- Material: 6061-T6 Billet Aluminum
- Manufacturing Process: CNC-Machined
- Shaft Material: Hardened Steel
- Standard Pulley Diameter: 76mm
- Pulley Configuration: 8-Rib
- Pulley Type: Smooth
- Available Bearing Options: Steel or Ceramic
- Part Number: 9740
- Country of Manufacture: USA
Fitment
- 2005 Ford Mustang GT - 4.6L Modular V8
- 2006 Ford Mustang GT - 4.6L Modular V8
- 2007 Ford Mustang GT - 4.6L Modular V8
- 2008 Ford Mustang GT - 4.6L Modular V8
- 2009 Ford Mustang GT - 4.6L Modular V8
- 2010 Ford Mustang GT - 4.6L Modular V8
Additional Notes
- This is the Street version featuring a 40 lb. spring rate.
- The default configuration includes a 76mm 8-rib smooth pulley with steel bearings.
- A 76mm pulley with ceramic bearings is available as an optional upgrade.
- A tensioner-only configuration without a pulley is also available.
- Verify belt configuration, pulley requirements, supercharger setup, and vehicle compatibility before ordering.
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
