Get a good muffler shop to put a high flow muffler on. I didn't know till a few weeks ago when I had mine done the Sephia's have 2 mufflers. Why, I don't know. And if they are really nice have em cut the cat off.. That's my next one...
And get a K&N filter. That will help a little...
I don't know anything about the chip. Any others have any luck with it???
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