Yella Terra Boost Pulley for Whipple Superchargers – 3.500" 10-Rib 5-Bolt – Black
Australian-made to Whipple OEM specifications, Yella Terra Boost Pulleys give local workshops a wide choice of pulley sizes to increase or decrease boost, with options to suit both US and Australian engine configurations, including Whipple Australia supercharger kits.
Choose the right pulley for your Australian drive system. The Yella Terra range includes pulleys specifically manufactured for the different supercharger drive arrangements used in Australian applications. Some overseas listed pulleys for the same Whipple supercharger may not suit your local installation—matching the diameter, rib count and bolt pattern alone does not confirm the correct offset or belt alignment.
Each pulley is precision machined from 6061-T6 billet aluminium and anodised for wear and environmental protection. Features include an engraved running diameter for easy identification, lightweight machined pockets to reduce rotating mass, and an integrated belt guard to help minimise unwanted belt wandering during hard running. The standard finish is hard-coat black anodising, with an optional blue finish available.
All pulley sizes are specified by their running diameter. As a general guide, every 0.125" change in pulley diameter may alter boost by approximately 0.75 psi. A smaller supercharger pulley generally increases boost, while a larger pulley generally reduces boost. Actual results vary with the engine combination, drive ratio, supporting components and calibration.
Whether you are increasing or reducing boost, choosing locally manufactured Yella Terra pulleys provides access to local support to help match the pulley to your engine and drive configuration.
Specifications
Pulley running diameter: 3.500"
Belt configuration: 10-rib
Mounting pattern: 5-bolt
Material: 6061-T6 billet aluminium
Finish: Hard-coat black anodised
Manufacture: Australian-made to Whipple OEM specifications
Check before ordering: These pulleys are application-specific. Do not order this pulley for a different application without confirming compatibility. Check your engine application, supercharger model, pulley offset, rib count, bolt pattern and belt alignment. If unsure, contact Yella Terra for assistance selecting the correct pulley. Boost changes may require adjustments to engine calibration and supporting components.
No returns or exchanges on used pulleys.
