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Ships within 48 hours · Estimated delivery Jul 27 - Aug 1
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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
4.3 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 5
Will purchase again
Size: 6 in, Color: Blue
Dogs love this. Chew-on-able, and durable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
★★★★★ 5
Good buy
Size: 6 in, Color: Blue
A winner with our GSD. He’s not a super aggressive chewer but it has still held up and is a favorite.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026
★★★★★ 5
Terrific toy for heavy chewers
Size: 6 in, Color: Blue
My dog loves this! Chews and plays with it constantly. These will last a long time, however, eventually they begin to break down. THEN GET ANOTHER, lasted a couple months with constant chewing.
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Reviewed in the United States on August 29, 2025
★★★★★ 3
My dog doesn't like it
Size: 5 in, Color: Orange
My dog wasn't a fan of this at all. He was curious about it, probably because he could smell it, but he wasn't sure about chewing it.
It could be because his teeth squeak against it? Or maybe it has an odd texture? I don't know
But this has sat in the toy bin untouched since the day we got it
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Reviewed in the United States on October 13, 2025
★★★★★ 4
Not for older dogs
Size: 6 in, Color: Blue
Item was on point as described, but my elderly dog was not interested.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 2, 2026
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