i have a 93 rx-7 with a HKS cat-back and a blitz intank. I wanted to put a down pipe in but am not sure if i need a ecu...i don't know if my car will run lean.I have a air/fuel gauge but i hear that you can't go by that...and whats the best down pipe out there?



thanks Mark T.

 

sorry for the big pic...i love how that car looks

 

Try posting in the 3rd gen specific forum...you'll get an answer a lot quicker.