correct spelling.Apex seals. if your getting a 1st gen. then you have a choice between engines. 12a and 13b. 12a is carburated will 13b is FI.
www.mazdatrix.com for some great info and parts for wankels. also RX-7 burns oil as a part of its natural combustion process. So make sure to check your oil every gas fill up, and add as necessary to maintain the full level.