The new R-OK radiator from New-Line Racing. The R-OK is designed specifically for OK and OKJ classes with optimal cooling and minimized weight. Used by top European teams such as Ricky Flynn Motorsport (RFM) and Kart Republic Factory (KR). The New-Line R-OK radiator comes with the Air Choke and Support included.

At the beginning of the OKJ / OK classes era the total weight of the kart plus driver was significantly reduced compared to the earlier KF classes. Therefore New-Line Racing wanted to contribute to the weight reduction by manufacturing the R-OK Radiator. A radiator that is capable of meeting the needs of the new CIK-FIA approved engines while still keeping the weight to a minimum. To do it, compared to the regular "R" model, they developed a new light weight support that still makes it possible to adjust and angle the radiator to any required position.