just wondering if anyone knew if the second cat on the lancer really matters. will it make a huge difference on emissions testing or can i cut it back to one.

 

Yes it will make a huge difference and i dont think you will pass... there is still the slim possibility that you will though

 

the lancer has two cats?

 

i work for the largest catalyst manufacturing company in the world. alot of times there are multiple cats that contain different precious metals and base metals . these two cats work together , but have different chemical reactions. So one might not be good enough to pass.
I am so glad that we dont have emissions here.

 

Two cats? That's news to me- I have only seen cat, resonator, and muffler except on true dual exhaust cars. Two O2 sensors for the OBD2 systems yes, but two cats?

 

mitsubishi certainly didnt install it for no reason.

people need to stop second guessing the engineers that spend years designing our modern injection/emission systems.
you wont gain any power if you remove it, either.

 

well im definitly not saying that they installed it for no good reason but if i put a new exhaust on the lancer do you think i would need to keep both?

 

i took off my 2nd cat.....it has more power...low end torque is down a little, but it sounds awesome