These are the new and improved / updated Stand Pipes and Dummy Plugs. The stand pipes have the integrated check valve & Teflon back-up seals to help prevent internal leaks. If you don\'t have the new ...

Diesel engines, for all their rugged usefulness, can be tremendously polluting. They produce more NOx — nitrogen oxides-based emissions – than gasoline-fed cars, as well as more particulates, aka soot ...