Metco 10.5" Lower Crank Pulley Kit LSA

Interchangeable Crank Pulley Kit

2009-2015 Cadillac CTS-V, 2012-2015 Camaro ZL1

This crank pulley kit is based on the Innovator's West replacement balancer assembly for the GM LSA engine.  This kit represents a clean and simple way to add boost and horsepower to your supercharged Cadillac or Camaro without making any permanent modifications. 

The SFI-approved Innovator's West balancer is precision-machined in the USA and installs directly in place of the factory unit.  The IW balancer and crank ring assembly weighs only 12.6 lbs, compared to 16.2 lbs for the factory steel unit.  Installation of this kit removes significant rotating mass from the front of the engine, and it adds the benefit of the wet clutch harmonics-dampening technology, which has made the Innovators West balancer the premier balancer in Motorsports.

Our CNC-machined crank pulley rings bolt directly to the new balancer using the provided fasteners.  Once the balancer assembly is installed, changing the outer ring to adjust the boost level is simply a matter of six the allen-head fasteners.  Crank pulley rings are also available separately and are listed elsewhere in this section.

We installed the IW balancer and 9.55" crank pulley ring on our own CTS-V.  On ProDyno's chassis dyno, the car made 547 HP at the tires, right off the street, with a very safe tune.  The car showed a max boost level of 13.5 lbs (13.9 indicated on the dash gauge).

To complete your kit, please choose your desired crank pulley size below. 

Note:  The 8.60" & 9.10" kits will fit with the original 70mm crank idler pulley, but the 9.55", 10.00" & 10.50" crank pulleys require the use of our crank idler pulley relocation bracket to reposition the idler.  This bracket is available under PN MRB1000.

Supercharger Belt Lengths:

+2 lbs 8.60" Crank pulley ring and stock idler pulley:  67.5" belt

+3 lbs 9.10: Crank pulley ring and 50mm or 63mm idler pulley:  68.0" belt

+4.5 lbs 9.55" Crank pulley ring and 50mm idler pulley:  69.0" belt

+5.5 lbs 10.00" Crank pulley ring with 63mm idler pulley and idler relocation bracket:  71.5" belt

+6.5 lbs  10.50" Crank pulley ring with 63mm idler pulley and idler relocation bracket:  72.5" belt (estimated)

Note 1:  The original belt in most applications is 66.0" in length.

Note 2:  The Innovator's West part number for the balancer included in this kit is 840/1000.

Note 3:  The crank pulley rings may also be purchased in a 10-rib configuration for custom applications.  Please call for details on availability and pricing.