The Liqui-Moly Petrol Combo Pack is comprised of the Pro-Line Petrol Intake Cleaner an Speed Tech Petrol Additive. The system cleaner is a high-tech additive solution that removes stubborn dirt and other residue within the intake and throttle valve area. The removal of such residue enhances performance as well as reducing fuel consumption. The Speed Tech Petrol Additive was developed to increase acceleration under partial load whilst providing a better driving experience. The additive has been tested safe for all 2 stroke and four stroke engines as well as vehicles with catalytic converters and turbochargers.