dynamax and magnaflow will flow the best but i like the semi-muffled tone of flowmasters. still agressive sounding and a performance gain for sure but not quite AS much as a straight muffler w/o baffles.
your performance is gained more through the type and style of piping used as much if not more than the muffler you use.
make sure it is MANDREL BENT STEEL
and the same size as your header and muffler inlets/outlets.
