The actual data contained within the parts compatibility tab is provided to eBay & us by a 3rd party automotive cataloging company. This data was originally intended for professional automotive technicians, service writers, & other automotive professionals that require this data. Since this data was designed for automotive professionals, the data contains numerous abbreviations and shorthand that may not be easily understood by do-it-yourselfers or anyone else looking for an auto part. I have been in the automotive repair industry for 20+ years and still come across some shorthand & abbreviations that I don't know. We are creating a glossary of abbreviations & short hand below. Also please do not be afraid to ask (Call us toll free at 1-866-770-2771) and if you saw the amount and type of questions that we get about this type of thing, you would realize there is no stupid question (well some are, ha-ha j/k). The only thing possibly considered stupid is not asking the question before purchasing. Our number one biggest headache that we & our customers deal with is buying the wrong part. Sure we screw up every once and awhile as we are human just like most of you reading this(aliens & robots never make a mistake), However the single biggest problem we run into is the customer purchasing the wrong part. Please know that we are here to help you in any way we can. We spend countless hours & countless dollars attempting to put our data in front of customers in an easy to read and efficient format for you to select the correct part. It does us absolutely no good to sell you the wrong part and we work very hard to prevent that, however you have a responsibility to read the eBay listings completely & PLEASE USE THE COMPATABILITY TAB.