SD Cummins Water By-Pass Kit

🛠️ Rear Coolant Bypass Kit – Fits 1998–2016 Dodge Cummins 5.9 & 6.7L (24V & Common Rail)

Reduce rear cylinder pressure and improve coolant flow with this bolt-on Rear Coolant Bypass Kit, designed specifically for 1998–2016 Dodge Cummins 24-valve and Common Rail cylinder heads. This system helps eliminate hotspots and pressure buildup at the back of the engine—no driveshaft or major drivetrain removal required.

Perfect for daily drivers, tow rigs, or high-horsepower builds, this kit is built with high-quality components and is fully adjustable to match your setup.

—

🔧 Key Features:

✅ Fits 1998–2016 Cummins 5.9L & 6.7L 24V and Common Rail heads
✅ Reduces excessive coolant pressure at the rear of the engine
✅ No driveshaft or trans removal required for installation
✅ Includes aluminum thermostat spacer with O-ring and hardware
✅ Braided stainless AN-8 line with pre-installed fittings
✅ Brass adjustable bypass valve (45–100 psi range)
✅ Works on both 5.9L and 6.7L Cummins engines

—

📦 What’s Included:

• Aluminum thermostat spacer w/ mounting hardware & O-ring

• AN-8 braided stainless bypass hose (fittings on both ends)

• Brass water bypass valve (adjustable from 45–100 psi)

—

Protect your engine and extend coolant system life with this easy-to-install rear coolant bypass kit—built for performance, longevity, and simplicity.