Wehrli WCF100443 Billet Oil Fill Cap Black Anodized for 01-26 GM 6.6L Duramax

Regular price: $63.95
Regular price: ~~$53.00~~
Sale price: $63.95

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In Stock: 12

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Product Specification:

SKU:WCFWCF100443

MPN: WCF100443

UPC: WCF100443

Weight: 0.4 lb

Inventory: 12

Type: Oil Fill Tubes

Vehicle Fitment

2001-2026 Chevrolet Silverado 2500 HD / 3500 HD (6.6L Duramax LB7, LLY, LBZ, LMM, LML, L5P)
2001-2026 GMC Sierra 2500 HD / 3500 HD (6.6L Duramax LB7, LLY, LBZ, LMM, LML, L5P)
GM 2.8L LWN Duramax (compatible applications)
Compatible GM LS Gasoline Engines: 4.8L V8 (LR4, LY2, L20), 5.3L V8 (LC9, LH6, LH8, LH9, LMF, LM4, LM7, LY5, LMG, LS)

Fitment Notes

Direct OEM replacement - complete cap, not a cover or overlay
Replaces GM OEM Part Numbers: 97350955, 97216410, 12573341, 12677347
Pairs directly with WCFab Billet Aluminum Coolant Tank and Brake Reservoir Caps for a cohesive engine bay appearance
Installs in seconds - no tools required

Features

CNC machined from billet aluminum - replaces the factory plastic cap with a durable, precision-made component
Black anodized finish for corrosion resistance and a clean, aggressive underhood appearance
Machined cam lock engagement ensures a secure, rattle-free fit identical to OEM operation
Includes high-quality O-ring seal for leak-free performance
Engraved Wehrli Custom Fabrication logo on the underside of the cap
Made in the USA - installs in seconds with no tools required

Specifications

Material: CNC Machined Billet Aluminum
Finish: Black Anodized
Seal: Included O-Ring
Engagement: Machined Cam Lock
Weight: 2.0 lbs
Package Dimensions: 11" (L) x 9" (W) x 1" (H)
Position: Engine Oil Fill Tube Cap

Included Components

1x Wehrli Billet Aluminum Oil Fill Cap - Black Anodized
1x O-Ring Seal

Product Description

The Wehrli Custom Fabrication WCF100443 is a CNC machined billet aluminum oil fill cap designed as a direct OEM replacement for the factory plastic cap on 2001-2026 GM 6.6L Duramax-equipped Silverado and Sierra 2500 HD / 3500 HD trucks. This is a complete cap - not a cover or slip-on dress piece - machined to the same cam lock engagement as the factory unit so it installs and operates identically to stock. A precision O-ring seal is included to ensure a leak-free fit, and the black anodized finish protects the aluminum from corrosion while delivering a clean, blacked-out underhood look.

Beyond aesthetics, the WCF100443 eliminates the common cracking and degradation that plastic OEM caps experience over time and under heat cycling. The engraved WCFab logo on the underside adds a finishing touch, and it pairs directly with other Wehrli billet engine bay components including their coolant tank and brake reservoir caps for a cohesive custom underhood appearance. Compatible across all 6.6L Duramax generations from LB7 through L5P, as well as select 2.8L LWN Duramax and GM LS gasoline engine applications.