Upgrade your 2011-2016 GM 6.6L Duramax LML with the PPE Water Pump to Thermostat Housing Coolant Bypass Tube for a permanent, corrosion resistant solution.

The OEM mild steel tube is prone to rust, contaminating your coolant system and leading to potential leaks. Over time, factory O-rings harden and lose compression, increasing the risk of coolant leaks and overheating issues. PPE solves this problem with a polished 304 stainless steel tube, hydroformed for exact fitment and designed to last. This upgrade ensures long term durability and eliminates the corrosion issues of the stock part. The kit includes both upper and lower O-rings, so you get a complete, hassle free replacement.

Swap out the weak stock part and keep your truck running cool, clean, and leak free.