When it comes to new compressors, you can't do better than going with the unit manufactured by the OE supplier. As one of the world's largest OE suppliers of A/C compressors, Denso knows these units better than anyone because they originally designed 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.