(mixman How do/will they affect you EPA/Ecology/Emissions exam?)

I would think this should not affect it.. As long as you have the cat converters on. mufflers are usually on to quiet down the sound.

I did forget to say that I am also running AMSOIL 5w30 oil. with a stock air filter. I was running royal purple.. Thought I would try amsoil.. Soo many good reviews on that stuff.. I don't know if that is helping with the fuel mileage any..

 

You Used two Cherry Bomb Glass Packs, What Length were they ?
I've been told the longer the muffler the deeper the sound .

 

Hey, I'd like more information on the Cherry Bombs, also.
Update (size/model/length/inlet/outlet).