Pistons and cylinder liners for the Citroen DS 21 are crucial engine components responsible for combustion and vehicle power. They provide efficient compression of the fuel-air mixture and are renowned for their durability and reliability. These parts are engineered to perfectly match the specifications of the DS 21 engine, ensuring optimal performance and longevity of the vehicle. They are a must-have for anyone looking to maintain the classic driving experience and performance of the iconic Citroen DS 21.