Wehrli Custom Fabrication WCF100397 Duramax S400 Single Turbo Oil Line Kit LB7/LLY/LBZ/LMM/LML

The Wehrli Custom Fabrication WCF100397 is a complete oil line kit designed for LB7, LLY, LBZ, LMM, and LML Duramax engines running an S400-series turbocharger mounted on a 6-inch tall pedestal. This kit provides everything needed to properly route pressurized oil feed and gravity-return drain lines to and from the turbocharger, ensuring reliable lubrication for long turbo life.

Also compatible with 2001–2004 LB7 Duramax applications running an S300 single turbocharger, making this a versatile solution for a range of popular Duramax single-turbo builds.

Kit Contents:

• Parker stainless braided #10 drain line
• Parker stainless braided #4 feed line
• Plug for OEM oil feed location in valley
• Fitting for turbo oil feed
• Fitting for engine block oil galley
• Turbo drain flange and fitting

Key Features:

• Designed specifically for S400 single-turbo conversions on LB7/LLY/LBZ/LMM/LML Duramax platforms
• High-quality Parker stainless braided lines for durability and heat resistance
• All necessary fittings included for a complete installation
• Not legal for sale or use in California
• Made in the USA by Wehrli Custom Fabrication

Wehrli Custom Fabrication (WCFab) is a premier manufacturer of high-performance diesel components, specializing in Duramax, Powerstroke, and Cummins diesel truck upgrades. Every WCFab product is engineered and built in the USA to deliver exceptional quality, fitment, and performance.