Parts, tools, and test equipment

Maximize Performance. Minimize Heat. Protect Your Engine.

Overheating rear cylinders are robbing your 1998.5-2018 Dodge Cummins 5.9L & 6.7L of power and longevity-fix it in under 30 minutes with the Motorsport Diesel Coolant Bypass Kit. Engineered for superior cooling efficiency, this billet aluminum kit relieves excess pressure, reduces water pump strain, and prevents costly engine wear. Featuring a precision pressure relief valve, it dynamically regulates flow-something a thermostat simply can’t do. Whether you’re towing, daily driving, or chasing horsepower, this is the upgrade your Cummins can’t afford to go without. Get yours now and keep your engine running stronger, longer.

Replace the eleven factory press-in cylinder-head freeze plugs beneath the valve cover with thick steel threaded plugs. Designed for 1998.5-2018 24-valve 5.9 and 6.7 Cummins engines.