FKR121 - OHLINS Aprilia RSV4 Racing Cartridge Kit (TTX 25)Racing cartridge kit by Ohlins for Aprilia RSV4 models. The racing inspired cartridge kit has technology derived straight from the Moto3, Moto2 and World Superbike championships developed by our engineers in Sweden and is designed for high end racing. The cartridge kit features a spring pressurized system, compared to the old gas pressurized system, the spring pressure offers a more simplistic and user friendly design that also accounts for easier