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UnderDog Diesel - Coolant Hoses & Pipes
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UnderDog Diesel
- UnderDog Diesel 2011-2016 Duramax LML Rear Engine Cover Coolant Return Plug
SKU: UDD112
PART #: UDD112
$23.99

UnderDog Diesel
- UnderDog Diesel 2011-2016 GM 6.6L LML Duramax Coolant Bypass Kit
SKU: UDD-LML-Coolant-Bypass
PART #: UDD-LML-Coolant-Bypass
$104.95

Wehrli Custom Fabrication
- Wehrli Custom Fabrication 2006-2010 LBZ/LMM Duramax Upper Coolant Pipe - WCF100622
SKU: WCF100622
PART #: WCF100622
$138.71
$143.00
WCFab Red, WCFab Grey, Gloss White, and Gloss Black in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.

Wehrli Custom Fabrication
- Wehrli Custom Fabrication Duramax Coolant Plug - WCF100025
SKU: WCF100025
PART #: WCF100025
$23.28
$24.00
In Stock. Ships in 3-5 Business Days.

Wehrli Custom Fabrication
- Wehrli Custom Fabrication LB7/LLY/LBZ/LMM Duramax Coolant Plug - WCF205-280
SKU: WCF205-280
PART #: WCF205-280
$39.77
$41.00
This Product cannot ship to the state of California
In Stock. Ships in 3-5 business days.

Wehrli Custom Fabrication
- Wehrli Custom Fabrication 2013-2015 6.7L Cummins Upper Coolant Pipe for Dual Radiator - WCF100867
SKU: WCF100867
PART #: WCF100867
$212.43
$219.00
WCFab Red, WCFab Grey, Bengal Red, Gloss Black, and Gloss White in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.

Wehrli Custom Fabrication
- Wehrli Custom Fabrication 2019-2023 6.7L Cummins Standard Output (SO) Upper Coolant Pipe - WCF100223
SKU: WCF100223
PART #: WCF100223
$152.29
$157.00
WCFab Red, WCFab Grey, Bengal Red, Gloss White, and Gloss Black in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.

Wehrli Custom Fabrication
- Wehrli Custom Fabrication 2001-2004 LB7 Duramax Modified OEM Upper Coolant Pipe for S300/S400 Kits - WCF100797
SKU: WCF100797
PART #: WCF100797
$242.50
$250.00
In Stock. Ships in 3-5 business days. While Supplies Last!

Wehrli Custom Fabrication
- Wehrli Custom Fabrication 2011-2016 LML Duramax Upper Coolant Pipe - WCF100696
SKU: WCF100696
PART #: WCF100696
$151.32
$156.00
WCFab Red, WCFab Grey, Gloss White, and Gloss Black in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.

Wehrli Custom Fabrication
- Wehrli Custom Fabrication 2001-2005 LB7/LLY Duramax Top Outlet Billet Thermostat Housing and Upper Coolant Pipe Kit - WCF100405
SKU: WCF100405
PART #: WCF100405
$459.78
$474.00
WCFab Red, WCFab Grey, Gloss Black, and Gloss White in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.

Wehrli Custom Fabrication
- Wehrli Custom Fabrication 1999-2023 GM Billet Coolant Heater Core Firewall Fitting - WCF100155
SKU: WCF100155
PART #: WCF100155
$39.77
$41.00
In Stock. Ships in 3-5 business days.

Wehrli Custom Fabrication
- Wehrli Custom Fabrication 2007.5-2010 LMM Duramax Coolant Bypass/Relocation Fitting - WCF100798
SKU: WCF100798
PART #: WCF100798
$40.74
$42.00
In Stock. Ships in 3-5 business days.

Wehrli Custom Fabrication
- Wehrli Custom Fabrication Cummins #10 JIC / -10AN Coolant Fitting - WCF205-136
SKU: WCF205-136
PART #: WCF205-136
$44.62
$46.00
In Stock. Ships in 3-5 business days.

Wehrli Custom Fabrication
- Wehrli Custom Fabrication 2001-2005 LB7 / LLY Duramax Upper Coolant Pipe - WCF100860
SKU: WCF100860
PART #: WCF100860
$138.71
$143.00
WCFab Red in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.

Wehrli Custom Fabrication
- Wehrli Custom Fabrication GM Billet Heater Core Fitting Kit with Hose - WCF100699
SKU: WCF100699
PART #: WCF100699
$73.72
$76.00
In Stock. Ships in 3-5 business days.

Wehrli Custom Fabrication
- Wehrli Custom Fabrication 2010-2018 6.7L Cummins Upper Coolant Pipe for Single Radiator - WCF100517
SKU: WCF100517
PART #: WCF100517
$152.29
$157.00
WCFab Red, Bengal Red, and Gloss Black in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.

Wehrli Custom Fabrication
- Wehrli Custom Fabrication 2020-2024 L5P Duramax Upper Coolant Pipe Kit - WCF100541
SKU: WCF100541
PART #: WCF100541
$162.96
$168.00
WCFab Red with Standard Brushed Tag, WCFab Grey with Standard Brushed Tag, and Gloss Black with Standard Brushed Tag in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.

Wehrli Custom Fabrication
- Wehrli Custom Fabrication 2006-2010 LBZ/LMM Duramax Top Outlet Billet Thermostat Housing and Upper Coolant Pipe Kit for DUAL CP3 - WCF100424
SKU: WCF100424
PART #: WCF100424
$459.78
$474.00
10-15 Business Day Lead Time

Wehrli Custom Fabrication
- Wehrli Custom Fabrication 2017-2024 6.7L Powerstroke Upper Coolant Pipe Kit - WCF100311
SKU: WCF100311
PART #: WCF100311
$416.13
$429.00
10-15 Business Day Lead Time

Wehrli Custom Fabrication
- Wehrli Custom Fabrication 2019-2023 6.7L High Output (HO) Cummins Upper Coolant Pipe - WCF100251
SKU: WCF100251
PART #: WCF100251
$154.23
$159.00
WCFab Red, WCFab Grey, Gloss White, and Gloss Black in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.