improving stock 3.8 exhaust?
I'm not interested in high performance or noisier exhaust. But, I'm considering trying to improve efficiency to get better mileage perhaps, while keeping things stock quiet. So my question is..
Would it not make sense to go from 2 x 2" pipes into 1 x 3" pipe to the muffler? The stock setup is a 2" pipe to the muffler. Has anybody done this? I suppose it would require a special resonator, since the cats and resonator come together as an assembly. Are there any 2" to 3" resonators out there that would work?