Toyota & Lexus U140-U240, U150, U151 & U250 Valve Body Accumulator Bore Piston Kits This Accumu-Seal Technology from Superior provides the simple solution for worn bores in Toyota and Lexus valve body castings and helps to eliminate burnt clutches, slips, flares and shifting issues. For the U150-250 Series: Burnt direct clutches, 2-3 flares, excess heat, burnt 2nd, and 4th & 5th gear shifting concerns. For the U140-240 Series: Reverse slip, burnt 2nd, 3rd and overdrive issues. Each Accumu-Seal Kit includes six patent-pending ringed pistons, plus a specially designed patent-pending Accumulator Buddy bore brush to clean and prep the accumulator bore surface before inserting the newly designed pistons with Teflon sealing rings. Each kit contains three fixes for U140-240 Series (2 needed per fix) or two fixes for U150-250 Series (3 needed per fix)