Scania GR875 GR905 Retarder Oil Cooler 2114175. OEM-grade retarder oil cooler for Scania GR875 and GR905 gearboxes. Fits Scania P, G, R and K series trucks. Stainless steel construction with pressure-teste... Request a Quote for Europe — send your OE number, quantity and destination country for a trade price.