Resonator delete + aftermarket muffler. If you wanna go loud like my V6 take out resonators and just straight pipe muffler onto nice new tips, taking out the muffler completely. But this is loud, id go with just resonator delete + nice magnaflows or something might see more performance from the weight taken off rather than HP gained lol but still sounds great. They did everything for me for under 200 i believe. Also, look into videos on youtube of your model car woth dofferent exhuast set ups, but i will say no video really dpes it justice, when i just left in resonators and took out my muffler, i did not notice a difference besides for a worse raspier sound, which i fixed by opening the muffler up and gettong rid of them resonators, but you may not want to go that loud so do your research unlike me. (I love my loud exhuast dont get me wrong, ive just been targeted by cops because of it.)
2.7, muscle? Performance? You'll get no real benefit on that motor wothout other supporting mods (cam, heads, headers) even if you did any of those others, the money is better spent getting a V8 hemi charger. At any rate, magnaflo and flomaster make good sounding cat back systems, or you can just replace mufflers.
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