how restrictive is the stock exhaust system?

Discussion in 'SN95 4.6L Mustang Tech' started by MotleyCrue, Dec 7, 2003.

  1. that depends on where you take it.. Catted midpipes will pass the sniffer just not visual (since the 2 preheaters are missing). So, just find a shop that will pass you as long as you pass the sniffer.. there are lots of gas stations out there :nice:

    magnaflow catted x has been one of my favorite mods thus far
  2. Very true, but it is still technically illegal and you're getting an "illegal smog check," if they don't actually perform the visual properly.
    It's totally one of those things you can get away with, but I don't want to be "rolling dirty..."

  3. I dynod 232 rwhp stock, and 255 w/ exhaust. Thats a 23 hp gain. I would say that is right at 10% gain.

  4. well motley, to give you another aspect from it. i went from 240-250 mi per tank to 300+ after full exhaust, so yeah it's pretty restrictive :nice: