This is a replacement supercharger pulley for the TRD/Magnuson Supercharger for the 1GR-FE engine found in the 2005-2015 Tacoma, and 2007-2009 FJ Cruiser.
This pulley is 2.85″ where the stock one is 3.00″. The normal increase in boost is 1.5-2 PSI over the stock pulley with normal power gains of 15-30 HP depending on combination and ambient conditions.
This is a “STEALTH” pulley is very similar in appearance to the stock pulley that comes on the supercharger and will work with the standard size supercharger belt. It even has the stock pulley part number LASER etched on it.
Installation requires removing the stock pulley with a strong gear or supercharger pulley puller and a special tool to press it onto the input shaft. You can have this done at your local speed shop or you can purchase the URD Press Fit Installation Tool to do it yourself.
Note- Does not fit the Magnuson supercharger for the 2010 and later FJ Cruiser and 4Runner.