go with high flow cats.
It's only $250 cdn more to get up. they are straight threw 2.5"
I went with a full custon exhaust. dual 2.5" threw 2.5" high flow cats threw 2.5" flowmaster 40's.
If a cop knows I don't have cats. It's a $350 plus you have to get the cats put on yur vehicle.
there is very lil loss in power running high flow cats.
I would like louder/meaner sounding at times. So I will try to get dumps put on.
If you want to save a lil money. get a flowmaster Y collector.
split/two 2.5" into 3" 16.5" long you can get dual 2.5 into 3.5"
need to have pipe bent to it. then 3" single pipe threw a 3" muffler.
had a 305
have a 357
want a Big Block