What could I have done wrong
My vehicle was sluggish going uphill in an attempt
to figure it out we decided to try checking
something out. We loosened up a bolt on a mesh
filter looking thing between the exhaust and
catalytic converter but the bolt stripped so we did
not attempt to take it out. We put the nut back on
and left it alone but after starting it up it now
sounds like a souped up street car and is loud. I
don't much about exhaust systems obviously so
any help on this would be greatly appreciated as it
is attracting unwanted attention.