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Pulley Upgrade Supercharged / Kompressors

One popular method of increasing performance on Supercharged cars is using a smaller pulley.  The smaller gearing increases the boost provided by the supercharger.

Nearly every aftermarket tuner offers smaller pulleys. UPD suggests via its product pages that 80mm is safe without a tune and 77mm will require a tune on the 2003-2007 M113K.  Please note the picture used in this post is of the UPD page.  Please consider using their stuff which is of high quality.


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