i am doing a engine transplant int my 99 gt with a cammed l67 ...my question is i bought some stainless zzp mufflers off of craigslist and plan on buying some sd headers once they come back in stock what else should i get to finish my exhaust .I want it to breathe well and have a nice aggressive sound but if possible i want no drone in the cabin.....what should i get guys any help would be appreciated