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Ships within 48 hours · Estimated delivery Sep 29 - Oct 4
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Description
Wehrli Custom Fab WCF100155 Billet Heater Core Firewall FittingThe Wehrli Custom Fab WCF100155 Billet Heater Core Firewall Fitting from GAP replaces the plastic fitting on your 2001 2023 GM 6. 6L Duramax. The factory plastic GM Coolant Heater Core Firewall Fitting is a common failure point on Duramax trucks and other GM vehicles. This billet aluminum direct fit replacement is more resistant to heat and vibration. Prevent leaks with this easy to install upgrade. Features: Billet Aluminum Double O Ring Seal Clear
The Wehrli Custom Fab WCF100155 Billet Heater Core Firewall Fitting from GAP replaces the plastic fitting on your 2001-2023 GM 6.6L Duramax. The factory plastic GM Coolant Heater Core Firewall Fitting is a common failure point on Duramax trucks and other GM vehicles. This billet aluminum direct-fit replacement is more resistant to heat and vibration. Prevent leaks with this easy to install upgrade.
Features:
- Billet Aluminum
- Double O-Ring Seal
- Clear Anodized Finish To Resist Corrosion
- Replaces Failure Prone Plastic Factory Fitting
- Direct-Fit Replacement With 5/8" Barb Connection
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
Very practical for the price.
Color: Black
Very practical for the price.
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Reviewed in the United States on May 25, 2026
★★★★★ 4
Good for a quick backdrop
This works well for what I needed – a simple background for my kids’ online school. It’s lightweight and very easy to put together, and it stands up fine without needing to mount anything.
The color is listed as black, but it’s more of a dark gray in person. Not a huge deal, just something to be aware of. It’s not super heavy duty, but it does the job for privacy and as a video backdrop.
Overall, a good, portable divider that’s quick to set up and works well for light use.
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Reviewed in the United States on February 21, 2026
★★★★★ 5
Essay to assemble
Color: Grey
Very nice. Did the job the way I wanted.
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Reviewed in the United States on April 28, 2026
★★★★★ 2
Low budget option
Color: Grey
Budget low quality if thats what youre looking for
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Reviewed in the United States on April 27, 2026
★★★★★ 3
Hard to assemble
Color: Grey
This is extremely hard to put together, but once its together it is pretty good. You will need to secure it to something. It falls over.
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Reviewed in the United States on March 6, 2026
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