Valve Cover Upgrade Package

This is an upgrade package for the family of LS engines.  It will replace the Valve Covers on 5.3 and 6.0 SSRs and provide improved air/oil separation in the PCV system.  GM originally developed these covers to reduce oil consumption in the factory LS engines offered with a supercharger beginning in 2009.  As a secondary benefit, these covers eliminate the clutter created by the coil mounting plates on the originally installed valve covers.

This package includes:

GM 12637686 Passenger Side Cover

GM 12637688 Driver Side Cover

GM 12609623 Oil Filler Neck

M10 to 3/8 PCV inlet fitting

M10 to 3/8 PCV outlet fitting with PCV orifice installed

Highly recommended for all SSRs with a Magnuson Supercharger.

Fits all: 4.8  5.3  5.7  6.0  6.2  7.0