I have recently removed the cats, emissions equip., and air pump... Now my question, what do i do with the two ports on the back passenger side of the engine that used to feed air to the main cat and other which used to feed air to the anti-afterburn valve (i think)? Right now i have them both plugged and it seems to run fine, just looks ugly. The one that used to feed the main cat looks like it could use a block off plate, but it didn't look like mazdatrix had one.

What has anyone else done?

thanks,

 

The Racing Beat header/exhaust kit comes with a blockoff plate and O2 sensor bung, and the presilencer comes with an air return fitting that sends exhaust pressure back to open the 5th and 6th ports on my 13B

I added a dual belt alternator pulley to make sure my water pump couldn't slip and therefore allow my engine to overheat.

http://www.wigglepup.com/RX-7/feature_dualpulley.php

 

Not using a header... Anyone else do anything with these two ports (1/2" pipe stubs)?