Crank Pulley Ring
2009-2015 LSA Applications, 2016 & Newer LT4 Applications
These are the individual crank pulley rings used with our Interchangeable Crank Pulley Kit for the GM LSA and LT4 engine. If you have our kit installed on your car, you can buy the rings separately for a quick and easy change to the boost level.
These crank pulley rings are precision-machined from billet aluminum, and black-anodized for long-lasting good looks. The ring dimensions listed are as measured from belt surface to belt surface. These measurements do not include the flanges of the pulley.
In LT4 (CTS-V and ZL1) applications, pulley rings as large as 10.0" can be used without changing or relocating idler pulleys on the blower drive. While no idler pulley changes are necessary when using the 8.60" pulley ring in LSA applications, some installers using the 9.10" pulley rings opt to substitute our 63mm crank idler pulley (MIP-63V) for the 70mm OEM unit to gain additional clearance, but this change is not required. With 9.55" and larger pulley rings, it is necessary to replace the original pulley mounting bracket with our revised unit (MRB1000), and use both the 63mm crank idler pulley (MIP-63V) and the 100mm supercharger idler pulley (MIP-100V). These items are listed elsewhere in this section.
Each ring size will require the appropriate supercharger belt. If you have questions regarding belt size, please call or email (Sales@MetcoMotorsports.com) for assistance.
Please choose from the available sizes below.
The 8.60", 9.10", 9.55" and 10.0" pulley rings can be used on the 2016 & later LT4 applications using the appropriate Innovators West balancer, PN 8410. Detailed boost data is not yet available.
Note: These crank rings can also be purchased in a 10-rib configuration for custom applications. Please call or email for details on availability and pricing.