Crow Cams / Genuine GM LS1 Valley Cover Gasket

LS1 Valley Cover Gasket provides the specified sealing components for its compatible engine or service application. Confirm the exact engine, casting, gasket arrangement and package contents before assembly.

Product specifications

Technical and supplier information

• Suits LS1 only see 12610141 for other LS engine types

Application and fitment

LS1 Supplier part number: 12558178

Supplied contents

The part or quantity described by this SKU is supplied. Related components, installation hardware and ancillary parts are separate unless explicitly stated.

Installation and configuration

• Confirm bore, cylinder-head casting, port shape, gasket thickness and engine generation. Clean and inspect the sealing surfaces before assembly.
• Use the correct tightening sequence and fasteners; replace torque-to-yield bolts and one-time-use seals where specified by the engine manufacturer.

Associated products and selection

BBT can confirm the exact engine-specific supporting components and provide a complete parts recommendation before ordering.

BBT product selection and workshop support

Built by Boost & Tune is an authorised Crow Cams dealer and performance engine workshop. We can assist with the correct camshaft profile, compatible valve-train hardware, engine preparation, installation and calibration. Provide the exact engine code, intended use and existing components so the complete package can be checked before ordering.

Vehicle Fitment

• Chevrolet Corvette C5 Ls1
• Holden Commodore Vt Vt Ii Ls1
• Holden Commodore Vx Ls1
• Holden Commodore Vy Ls1
• Holden Commodore Vz Ls1

Confirm chassis, engine, drivetrain and production-year compatibility before ordering.

Built by Boost & Tune Support

BBT can assist with fitment review, installation, supporting modifications, configuration and calibration requirements where applicable.