BaZZaD Report post Posted August 1 (edited) Hello! I need to order new pistons rings and I found on tascaparts that correct part number for my car is K2GZ-6148-A (indicated as Standard) and K2GZ-6148-B (indicated as 0.50mm o/s) I tried to find out what the difference is and in some online stores they told me that the K2GZ-6148-A option was discontinued, others said that option A is standard, and option B is needed after cylinder repair. Not sure what to order. Please help me figure it out. Maybe someone knows or can check with the dealer. Thank you. Edited August 1 by BaZZaD update Share this post Link to post Share on other sites
chipdog4 Report post Posted August 2 Why do you need new piston rings? You have to completely take apart the engine to replace them. Standard would indicate factory bore size. The other one indicated as .50mm O/S is oversized for when you have a catastrophic event and the cylinders need to be bored oversized to remove scratches or gouges. 1 Share this post Link to post Share on other sites
1004ron Report post Posted August 2 BaZZaD What are you planning to do, rebuild and bore the engine, ......... if you rebore then obviously you need the oversize rings that have an increased Outside Diameter. The reason why some places don't stock the standard ring sets is because most folks needed rings have rebored the engine. Share this post Link to post Share on other sites
