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128 Posts
I was wanting alittle input on their 4040xl muffler. I know they say you will gain mpg so how much will i gain. And i was wandering how it would sound if i left the cat on. So if someone can give me some info on their experinces with them and maybe some sound clips with a 6-speed, and the cheapest place to buy one. And will this system mount up in place of my factory exhaust?
