The cats basically work as mufflers, as far as sound goes. Remove the cats and ya get a better, louder sound with less back pressure.SpaceCowboy said:
From experience, a car with a good working emissions system (the electronic part) and no cats will pass emissions. I had an Eagle Talon TSi AWD with no cats and it always passed with flying colors. Same goes for my Ford Focus with no cats.The cats basically work as mufflers, as far as sound goes. Remove the cats and ya get a better, louder sound with less back pressure.
A lot of high-po aftermarket companies make "off road" (non street legal) exhaust kits to replace the cats of performance cars. Of course it helps if you live in a state that doesn't require emission testing.
Very true...if you are truelly concerned about the environment leave the cats intact...or better yet ride a bike!willgr1 said:the purpose of a catalytic converter is to reduce the amount of toxic compounds leaving the vehicle. these compounds (including nitrogen, carbon, lead, sulfur, phosphorus, etc.) are extremely harmful to the environment (and you!).
the purpose of a muffler is to reduce the sound of the exhaust on a vehicle. they do not remove toxic compounds or elements!
get a catback and headers LEAVE THE CATS ON!!!!....believe it or not they serve a very good purpose.
You are better off leaving the cats or getting a set of performance cats if you have cash to burn, reducing the backpressure of your exhaust system too much will degrade performance on a naturally aspirated engine.Very true...if you are truelly concerned about the environment leave the cats intact...or better yet ride a bike!
If you want good sound and maximum power increase the flow through the intake and exhaust...and remove the cats.