FLEECE FPE-TURBO-THERM DURAMAX TURBO THERMOSTAT DELETE PLUG

Running a non-water-cooled turbo on your Duramax? Cleanly block off the factory turbo coolant feed and gain room for larger intake plumbing with the FLEECE FPE-TURBO-THERM DURAMAX TURBO THERMOSTAT DELETE PLUG. CNC-machined 6061-T6 construction and an OE-style O-ring deliver a precise, leak-free seal—perfect for swaps, performance builds, or service work where you want simplicity and reliability. Fleece Performance FPE-TURBO-THERM, Duramax turbo thermostat delete plug, non water cooled turbo conversion, turbo coolant block off, CPP Diesel Fleece, LB7 LLY LBZ LMM Duramax upgrade

• Allows use of non-water-cooled turbochargers
• O-ring seal for leak-free installation
• Provides clearance for larger intake plumbing
• CNC-machined 6061-T6 aluminum

Fitment

Engines: GM Duramax 6.6L (LB7, LLY, LBZ, LMM)
Years: 2001–2010 (2500/3500 Silverado/Sierra; classic & new body where applicable)
Use case: For builds converting to a non-water-cooled turbocharger; replaces the stock turbo coolant feed at the thermostat housing.

Cross-Reference / Related Fleece Items (CPP Diesel)

• FLEECE FPE-DTFL-0116 Remote Turbo Oil Feed Line Kit (2001–2016 Duramax)
• FLEECE FPE-DTFL-S3S4-0116 Remote Oil Feed (S300/S400, 1/4" NPT)
• FLEECE FPE-RES-04.5-10 Billet Turbo Resonator Delete Plug (LLY/LBZ/LMM)
• FLEECE FPE-HAR-DMAX-VPS-ADPT Vane Position Sensor Adapter (LLY)

It replaces the OEM coolant feed at the turbo when converting to a non-water-cooled turbocharger, preventing leaks and simplifying your coolant routing.

No tuning is required. This is a mechanical block-off that does not alter ECM/TCM calibrations.

Yes—Fleece includes the correct O-ring for a proper seal.

Yes. See the specification table below for details and the official notice link.

Specifications for FLEECE FPE-TURBO-THERM