01-17 Duramax Fleece Coolant Block Off Plate Shirts The best part is when

The best part is when you run at lower pressures

3 - Quarts Over Stock

Provides 100 percent traction on demand without affecting on-road drivability or driveline wear

6L DURAMAX: Stock Tow: +50HP Performance: +75HP Extreme: +120HP

Level 4: +125HP

01-17 Duramax Fleece Coolant Block Off Plate Shirts The best part is whenUpgrade your rear engine cover and stop the coolant leaks for good! Fleece's blocking plate for 2001 2017 GM Duramax diesels is thicker than the stock plate and has an integral square cut O ring with no gasket required. OE covers are prone to leakage over time, our billet coolant block off plate with an integral O ring is an upgrade for your rear engine cover and will the stop the coolant leaks for good. Direct Replacement for GM P N: 97941204 Fleece