VPS 3 Part Performance System is designed to clean the entire fuel and air intake system. Using fuel additives that are added to the gasoline tank cleans only where the fuel actually passes. Fuel additives poured into the gasoline tank do not clean areas such as the throttle plate and the port between the throttle plate and the intake valves. Deposits on the throttle plate and the port between the throttle plate and intake valves can cause rough idling, hesitation, increased emissions and poor performance. VPS 3 Part Performance System is formulated with advanced synthetic technology and installed by professionals to clean all these critical areas which includes throttle plates, ports, fuel injectors, intake valves and combustion chambers. Sufficient deposits in any of these critical areas can interfere with the proper operation of your engine. Removing deposits in only one or two of these areas with an additive poured into the gasoline tank may leave your engine performance less than optimum. Each part of VPS 3 Part Performance System is formulated to provide the best cleaning available and the whole process takes only 15 to 20 minutes. Only professionals should install this product to insure each part is installed correctly. Complete installation instructions are available. VPS 3 Part Performance System safely removes deposits from the entire air and fuel system that begins at the throttle plate and continues through the combustion chamber. VPS 3 Part Performance System is a three part kit consisting of: VPS Super Concentrated Fuel Injector Cleaner (679710) contains synthetic cleaners to remove deposits from intake valves, fuel injectors, ports and carburetors. Power and performance can be reduced if deposits are allowed to accumulate in these vital areas. VPS Super Concentrated Fuel Injector Cleaner removes power robbing deposits to help your engine run as it was designed to run. It smoothes out rough idle, improves acceleration and reduces harmful emissions. Safe for catalytic converters and oxygen sensors. Contains no alcohol. One 10 ounce bottle treats up to 20 gallons of gasoline. Can be used with all gasoline and gasohol. VPS Throttle Body Cleaner (VP072) Throttle body deposits can cause rough idle and hesitation as well as reduce fuel economy and increase emissions. Equipment coated with gum, varnish, carbon, or dirt becomes sticky and inefficient. Sticking PCV valves can cause excessive oil consumption. VPS Throttle Body Cleaner is a blend of carefully formulated solvents designed to maximize cleaning power and remove deposits away quickly. VPS INTAKE CLEANER cleans fuel system components that most fuel injector cleaners fail to reach. VPS INTAKE CLEANER is professionally installed using an installation tool and works with VPS Fuel Injector Cleaner to thoroughly clean intake valves, manifold ports and combustion chambers. VPS INTAKE CLEANER contains powerful cleaners to clean fuel induction systems and formulated to eliminate exhaust smoke. These powerful cleaners are injected directly into the induction system without being diluted with gasoline like cleaners added to the fuel tank.