What do I have
 

I keep reading on everything..

I have a 1988 vert black on black

Is that S4 or S5?

6 port?

Just a little confused

Thanks

S4 6 port 13B NA, any questions?

All N/A engines in 2nd gen rx-7s were 6-port, and the Turbo models were 4-port. 86-88 are Series 4 cars, and 89-91 are Series 5. I believe all of this is covered in the FAQ at the top of this forum. There is a ton of usefull info there, worth a good read-over.

Thank you thank you thank you...

I did a search but it would take s4 and s5 cuz they are not big enough words.

Anyways

Thanks