hould you invest in ZAK products? ZAKTEK fluids are definitely worth the investment because they provide a wide range of protection. We have several different formulations for the following critical systems: fuel, brakes, engine, diesel, cooling, transmission, HVAC, power steering, and battery. We also offer a wide selection of products to maintain the exterior of your vehicle. The list of items you can choose from includes the following: Headlight Restoration Kit, Maximum Suds Car Wash, and Maximum Tire Shine. These products will keep your vehicle looking like new for many years to come.