Denso remanufactured ac compressors go through a rigorous remanufacturing process to meet Denso’s strict standard for quality. All remanufactured compressors are coreless, so you don’t have to worry about handling cores and the extra cost associated with them. Thrust bearings are structured to withstand tension and stress for maximum durability. Pistons are PTFE treated for smooth, efficient operation. Lightweight aluminum valve, shaft and swash plates for added strength. OE specified O-rings and seals are compatible with both R12 and R134a refrigerants. Snap rings are designed to improve performance under extreme heat. Includes OE-specified oil.