Ok gents, come this Tuesday im going to install my vibrant street performance muffler.iv been searching like crazy Hoping i get the sound im looking for right the first time! The wonderful " GROWL " i love from these subies.I went to a few mechanics to price check one told me deleting one cat was illegal >=l so they suggested remove the resonator.good or bad idea? I want a deep but loud growl something i can hear from inside my car as well.if i need to delete a cat ill find a Mechanic that will! That first Mechanic also suggested that the 2inch stock piping was good enough that putting 2.5 was useless?? Any advise would be greatly appreciated!