Coolant Bypass Tube - Water Pump to Thermostat Housing 2011-2016 GM 6.6L Duramax LML Pacific Performance Engineering FORD/DODGE/CHEVY " 1989-1998 12-valve engines require 1030060

1989-1998 12-valve engines require 1030060 exhaust valve spring kit

making it a reliable upgrade for both stock and performance applications

These units allow the adaptation of an oil cooler to any engine while maintaining the stock oil filter location

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Coolant Bypass Tube - Water Pump to Thermostat Housing 2011-2016 GM 6.6L Duramax LML Pacific Performance Engineering FORD/DODGE/CHEVY " 1989-1998 12-valve engines require 1030060The 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: