UnderDog Diesel Billet Coolant Block-Off Plate - 2001-2024 GM 6.6L Duramax
$50.95
Skip to product information
UnderDog Diesel Billet Coolant Block-Off Plate - 2001-2024 GM 6.6L Duramax
$50.95
UnderDog Diesel Billet Coolant Block-Off Plate – 2001-2024 GM 6.6L Duramax
The UnderDog Diesel Billet Coolant Block-Off Plate is the clean, permanent solution you need. Machined from high-grade billet aluminum, this plate seals off coolant ports with precision — no leaks, no slop, no workarounds.
Why You Need It
- Cleanly blocks off coolant passages
- CNC-machined billet aluminum for a precise, leak-free fit every time
- Eliminates the risk of coolant weeping from capped or plugged factory ports
- Durable anodized finish resists corrosion and heat
- Direct bolt-on installation — no drilling, tapping, or fabrication required
What's Included
- CNC-machined billet aluminum block-off plate
- High-temp gasket or O-ring seal
- Grade 8 hardware for installation
Fitment
- 2001–2024 Chevrolet/GMC 2500HD / 3500HD with 6.6L Duramax (LB7, LLY, LBZ, LMM, LML, L5P)
Do the job right. Seal it with billet and never look back.