I just got an 88 rx7 se n/a manual , I am confused on what a 4s is or a 5s and how do I find out what kind I have ...
another question is how many ports does it have ....

Trying to become smarter than what I am working on

 

86 to 88 is series 4 (S4) 89 to 91 is series 5 (S5) and if its N/A its a Six Port Turbo's are 4 port

 

thanks for the info