Don't trust RockAuto, they don't stand behind their products or provide good customer service. They shipped me two "quick struts", that were assemble wrong. While pissed, I had the car apart, and just recompressed them and rebuilt them properly. Their website said they would reimburse you if you had to fix a part, so I simply asked for the price difference back compared with a regular strut. They said I have should have just shipped it back! The cost of that exceeded what I was asking for, crazy! And, by the way, I was supposed to leave my car disassembled for weeks? They obviously don't care to make it right, never use them again. Bad enough they screwed up, worse they don't care to do the right thing.