Lingenfelter L250090309 Lingenfelter C6 ZR1 Corvette Supercharger Pulley 2009-12 v1.2 - Manual (Page 20)

Page 19.
66. Remove the cap on the pulley by using a
small flat head screwdriver and prying up.
67. Using a pulley removal tool, remove the
factory pulley from the supercharger front cover.
Please note that an LSA front cover was
used to illustrate steps 72-76. The pinning
process is the same for these front covers.
65. Remove the old dowell sleeves from the
front cover/housing. Install the supplied dowel
sleeves into the LS9 supercharger housing.
Install the sleeves in the bottom left and bottom
right hand corner of the supercharger housing.
DO NOT install sleeves on the front cover.
NOTE: Some early engines may not have a
dowel sleeves in the cover. Dowel sleeves
should be used on these early engines as well.
See example image for correct location.
68. If you are using a 2.55” or smaller pulley,
you will need to partially remove the fixturing
tabs on the casting of the front cover shown to
the left.