ATP AT-203 Friction Modifier is a full synthetic ATF additive that converts conventional Dex/Merc ATF to a highly friction modified fluid. The additive blends with ATF, offering instant results with no soak-in period and provides compatibility with HFM applications such as Chrysler ATF +3/+4, Honda Z1, Toyota Type T, Mitsubishi Diamond & Nissanmatic. It also incorporates synthetic base stocks, increasing lubrication and heat resistance properties to conventional ATF. Perfect for treating bulk purchased Dex/Merc, eliminates the need for more expensive / hard to find OEM fluids.