New piston technology enhances medium-duty engine efficiencyThe SoA patented technology primarily consists of precise, CNC-machined indentations on the piston top, called turbulators, but most often described simply as “dimples.” New piston technology enhances medium-duty engine efficiency By Staff/Wire Reports on February 8, 2023 SoA’s Hyperformance Pistons provide increased torque, horsepower and reduced emissions with up to 25% fuel savings.