Paxton Superchargers 8-Rib Pulley Upgrade - 4-Bolt W/P - Excludes Damper (2011-2012 Mustang GT) 4FQ116-005
8-Rib Pulley Upgrade Kit for 2011-2012 Mustang GT Supercharger Systems
The Paxton Superchargers 8-Rib Pulley Upgrade Kit (PN 4FQ116-005) is engineered to improve belt traction and drive stability on 2011-2012 Ford Mustang GT vehicles equipped with Vortech or Paxton centrifugal supercharger systems. This configuration is designed for vehicles using a 4-bolt factory water pump pulley and excludes the crank damper, making it ideal for specific performance upgrades or replacement scenarios.
By converting to an 8-rib drive system, this upgrade significantly reduces belt slip under higher load conditions while retaining the factory automatic belt tensioner for OEM-level reliability and belt control.
Performance & Drive System Advantages
- 8-rib belt design provides maximum traction and stability
- Maintains factory automatic belt tensioner functionality
- Improves reliability under increased boost and load conditions
- Designed specifically for Vortech and Paxton Mustang GT systems
Compatibility
This pulley upgrade is compatible with all 2011-2012 Vortech and Paxton Mustang GT supercharger systems equipped with a 4-bolt factory water pump pulley.
Included Components
- Supercharger pulley 2A038-347 (3.47" diameter)
- Correct-length supercharger drive belt 2A048-100
- All required hardware
- Precision-machined spacers
- Replacement alternator pulley
- Replacement water pump pulley
- Idler pulleys
- Crank damper screw
- Available with or without crank damper pulley (damper not included in this configuration)
Optional Supercharger Pulley Sizes
- 2A038-360
- 2A038-333
- 2A038-315
- 2A038-313
- 2A038-300
- 2A038-295
- 2A038-285
- 2A038-280
- 2A038-275
- 2A038-270
Important Installation & Tuning Notes
- Custom ECM tuning and fuel/ignition system upgrades are required whenever pulley ratios are changed from the original supercharger kit configuration
- Improper pulley selection can negatively impact engine and supercharger longevity
- Contact Vortech Technical Support for impeller speed calculations if needed
- Changing supercharger pulleys may reduce or void the supercharger warranty
- A Vortech BV-57 or Mondo compressor bypass valve is required for applications exceeding 13 psig
Special Tools Required
- 17mm hex impact driver (OEM alternator pulley removal)
- Crankshaft damper puller / installer tool
Quick Specs
- Manufacturer: Paxton Superchargers
- Part Number: 4FQ116-005
- Application: 2011-2012 Ford Mustang GT
- Drive Type: 8-Rib
- Water Pump Pulley: 4-Bolt Factory Style
- Crank Damper: Not Included
Emissions & Legal Notice
- NOT AVAILABLE OR LEGAL FOR SALE IN CALIFORNIA
- For off-road and competition use only
- Not emissions legal for street-driven vehicles
Fitment
- 2011 Ford Mustang GT
- 2012 Ford Mustang GT
Why Buy from Beefcake Racing?
Beefcake Racing is an authorized Paxton and Vortech dealer with deep experience supporting late-model Mustang supercharger systems. Whether you're dialing in boost, upgrading drive components, or planning a complete build, our team helps ensure you select the right components for safe, reliable power.
Email: sales@beefcakeracing.com
Phone: 1-855-827-7223
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
