Coolant Bypass Tube - Water Pump to Thermostat Housing 2011-2016 GM 6.6L Duramax LML Pacific Performance Engineering - 119000830 2023-chevrolet-silverado-1500-esi9579600 D-701-36) Remove your crushed oval-shaped

D-701-36) Remove your crushed oval-shaped stock down-pipe and replace it with a smooth

Tall 1-inch internal and 3/4 inch external cooling fins reduce operating temperatures as much as 40 degrees

2-inch OD and will give faster turbo response with lower exhaust temperatures

2011-2017 3

The OEM PF26 filter comes up short with only 259 square inches of 25-micron filtration capability

Coolant Bypass Tube - Water Pump to Thermostat Housing 2011-2016 GM 6.6L Duramax LML Pacific Performance Engineering - 119000830 2023-chevrolet-silverado-1500-esi9579600 D-701-36) Remove your crushed oval-shapedThe OEM mild steel tube is prone to rust, which can lead to coolant system contamination and eventual leaks. Over time, factory O rings also tend to harden and lose compression, increasing the risk of failure. PPEs upgraded bypass tube is specifically designed to work with the factory water pump and is crafted from high grade 304 stainless to prevent corrosion and ensure reliable, long term performance. OEM PN for Reference: GM 12633704 Features: