Sometimes you can hit the cat with a rubber or dead-blow hammer to see if it rattles.
Newbie
Quote:
I went without trouble, emissions within OK range, without two rear carbsOriginally Posted by CarboyS
How do you go through inspection (smog, emissions, etc.)?
Junior Member
A common thing from the import tuner world is to have the cats installed with a flange on each side and have them sell you a straight "Test pipe" for ummm.... Dyno Testing 
This makes an easy swap.
This makes an easy swap.
Newbie
Quote:
Exhaust sounds exactly the same, minus the rattle!
I know this is a super old thread but I am having the same rattling on my 2005 S500. When you went to straight pipe, you didn't have any computer codes or any problems? Also, no loud exhaust noise?Originally Posted by shellshock
Mine were rattling, and I had them removed and straight pipe installed in place. Total cost = $30.Exhaust sounds exactly the same, minus the rattle!
Thanks for the help
Newbie
I have the right side going out (probably soon to be followed by the left) The mechanic I was talking too side it would be difficult to fit universal's. Does anyone know if this is true. I'm considering using the Walker 82503 and 82600 units. Is there anything unusual about the OEM units? From the earlier posts, there doens't seem to be an issue. I am in California though.
