i have a 2.5in. rb downpipe and im about to get the presilencer soon IF i can expect something from that combo, with rest of the exhaust still stock. i want to build on this gradually cause lord knows us na fc guys are usually broke

 

You should notice a nice increase in power by removing the cat(s).

I've seen a lot of them in the 2nd gen. 'for sale' section lately...

 

there are many other cheap mods you can do to the NA RX-7 to get somegood dyno numbers.

I was doing right around 165-170 whp when i was still na

 

So you're going to replace your stock catalytic?
Your location says Cali - what about smog?


-Ted