# Wehrli 04.5-10 Duramax LLY/LBZ/LMM Billet Upper Valve Cover Set - Raw Aluminum

WCFab Billet Aluminum Upper Valve Cover sets fit LLY, LBZ, and LMM Duramax and are a great way to clean up your engine's appearance. Integrated o-ring seal replaces OEM gaskets and prevents the need for use of silicone sealers. Includes countersunk stainless steel fasteners and black anodized #10 JIC (-10AN) PCV fittings. Finished in raw aluminum ready for polishing or painting standard. Custom Color Powder Coat finishes available as an optional upgrade and carry additional lead time.We recommend pairing these with our Top Outlet Billet Thermostat Housing and Upper Coolant Pipe kits (or a forward facing thermostat setup) because these valve covers do not include brackets for the side mount routing of the OEM setup.

-   Black Anodized #10 JIC PCV Fittings
-   Left and Right Upper Valve Covers
-   Flush Head Stainless hardware
-   CNC Machined Billet Aluminum
-   Supersedes model: WCF100616
-   Raw Aluminum Finish
-   O-ring Seal
-   Made in USA

This Part Fits:

Year

Make

Model

Submodel

2004-2005

Chevrolet

Silverado 2500 HD

Base

2005-2006

Chevrolet

Silverado 2500 HD

LS

2005-2010

Chevrolet

Silverado 2500 HD

LT

2007-2010

Chevrolet

Silverado 2500 HD

LTZ

2006-2010

Chevrolet

Silverado 2500 HD

WT

2007

Chevrolet

Silverado 2500 HD Classic

LS

2007

Chevrolet

Silverado 2500 HD Classic

LT

2007

Chevrolet

Silverado 2500 HD Classic

WT

2004-2005

Chevrolet

Silverado 3500

Base

2004-2006

Chevrolet

Silverado 3500

LS

2004-2006

Chevrolet

Silverado 3500

LT

2004,2006

Chevrolet

Silverado 3500

WT

2007

Chevrolet

Silverado 3500 Classic

LS

2007

Chevrolet

Silverado 3500 Classic

LT

2007

Chevrolet

Silverado 3500 Classic

WT

2007-2010

Chevrolet

Silverado 3500 HD

LT

2007-2010

Chevrolet

Silverado 3500 HD

LTZ

2007-2010

Chevrolet

Silverado 3500 HD

WT

2004-2005

GMC

Sierra 2500 HD

Base

2006

GMC

Sierra 2500 HD

SL

2004-2010

GMC

Sierra 2500 HD

SLE

2004-2010

GMC

Sierra 2500 HD

SLT

2004-2010

GMC

Sierra 2500 HD

WT

2007

GMC

Sierra 2500 HD Classic

SL

2007

GMC

Sierra 2500 HD Classic

SLE

2007

GMC

Sierra 2500 HD Classic

SLT

2007

GMC

Sierra 2500 HD Classic

WT

2004-2005

GMC

Sierra 3500

Base

2006

GMC

Sierra 3500

SL

2004-2006

GMC

Sierra 3500

SLE

2004-2006

GMC

Sierra 3500

SLT

2004-2006

GMC

Sierra 3500

WT

2007

GMC

Sierra 3500 Classic

SL

2007

GMC

Sierra 3500 Classic

SLE

2007

GMC

Sierra 3500 Classic

SLT

2007

GMC

Sierra 3500 Classic

WT

2007-2010

GMC

Sierra 3500 HD

SLE

2007-2010

GMC

Sierra 3500 HD

SLT

2007-2010

GMC

Sierra 3500 HD

WT

## Details

- **Price:** 539.18 CAD
- **Vendor:** Wehrli
- **Type:** Valve Covers

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 539.18 CAD | In stock |

## Images

- Photo - Primary
- User 1
- User 1
- User 2
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/wehrli-04-5-10-duramax-lly-lbz-lmm-billet-upper-valve-cover-set-raw-aluminum)
> Updated: 2026-07-07