Wehrli Custom Fabrication WCF100486-CAT S400 High Mount 2nd Gen Swap Kit Cat Yellow

The Wehrli Custom Fabrication WCF100486 is a comprehensive S400 High Mount 2nd Generation Swap Kit engineered for the 5.9L Cummins diesel engine. This kit provides everything needed to mount an S300 or S400 series Borg Warner turbocharger in the factory high-mount location, delivering a significant upgrade over the stock turbo setup. This variant is finished in Cat Yellow powder coat for a bold, distinctive engine bay appearance.

Built by WCFab — a USA-based manufacturer specializing in high-performance diesel fabrication — every component in this kit is precision-crafted to deliver superior fitment, performance, and finish quality.

Kit Includes:

• 4" Shorty Down Pipe (mates to exhaust system V-band)
• 5" Air Intake
• Dry Air Filter
• Outerwear's Pre-Filter Cover
• Oil Feed Line Fitting
• Oil Drain Line Assembly
• 1/2" T4 Spacer Plate
• 3" Hot Side Intercooler Pipe

Powder Coat Finish: Cat Yellow — applied in-house by WCFab for a durable, high-quality finish that resists chipping, fading, and corrosion under demanding conditions.

Wehrli Custom Fabrication products are made in the USA and are renowned for their precision TIG welding, premium materials, and exact OEM-style fitment. This S400 swap kit is the ideal foundation for a high-performance turbo build on your 5.9L Cummins-powered truck.