HKS Oil Cooler Kit | Honda S660 JW5 (15004-AH103)Upgrading the exhaust system, performing ECU tuning with the Flash Editor, and installing the turbine kit work together to unlock the full potential of the Honda S660, allowing the engine to rev freely and deliver smoother, more responsive performance. However, due to the mid ship engine layout, traditional air cooled oil cooler setups are limited in placement and often lack optimal airflow. To overcome this challenge, HKS developed a water cooled oil