Been trying to find a haynes manual but no luck. Just picked up this 3rd gen, and been going through bolts and parts, and saw this from underneath the turbo side and was wondering if it had to be plugged with a blockoff. The car doesn't have the air pump/ac/ps or stock exhaust/cats. Thinking it was like the 2nd gen with a pipe running to exhaust.

 

Yup, that pipe feeds back to the oem catalytic converter, air is pumped in via the air pump.

 

There is no Haynes Manuel for the 3rd gen, but thankfully the factory service manuals can be found on-line. They are pretty good detailing all the inner workings.

 

Yup FSM is definitely a must

 

Pick up a block off plate kit from one of the vendors on here. Banzai Full Function, and RX7 store have decent kits.

 

Here you go FD3s RX-7 Block Off Plates

 

^I've been happy with mine from Banzai.