i really hate catalytic converters and want to remove them, but my exhaust ends there. it kind of rusted off. can someone direct me to a straight pipe and/or dual exhaust from there on? please? and what do i need to replace the air box with a cone filter? would the one off of ebay work? http://cgi.ebay.com/ebaymotors/ws/eB...&category=6770
thanks
Justin

 

I am not sure but sometimes on foreign cars you can usually get away with hollowing out the catalytic converter. Its good for a couple of extra hp and a couple extra mile to the gallon. It also looks like they are still there for emmisions

 

The only way that works is if your 02 sensor is before the catalytic convertor

 

You could perform a search, but these are good sites to bookmark. I am sure there are some I am forgetting, but anyway...rotary Performance has some good catback systems, mazdatrix has a good full dual exhaust headers on back...I don't know much about corksport, but I hear they have some good stuff.

http://www.rx7.com/
http://www.mazdatrix.com/
http://www.corksport.com

If you plan on hollowing out your cats, just be forwarned that a NA RX7 will be pretty loud, as I understand it.