The stock pulley that comes on the TRD Supercharger is a 3.0" pulley.
This upgraded pulley is 2.85" for increased boost (approximately 1.5-2 PSI) and is designed to look identical to the stock pulley (pictured), even the etched in part number is the same.
If you want increased boost, but have warranty concerns, this higher boost pulley disguised as a stock pulley may help you avoid that problem.
This is a press on pulley and will require a press tool to install it.
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