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03-10-2010
i used to have a 3.1 too, theres not much you can do to these engines besides get really good mpg lol. you could do an intake and exhaust. idk about pcm, you're car is a diff year then mine but i know a pcm in mine wouldn't have done anything lol. other than that id say trade it in too.
03-10-2010
other than what the other say about the exhaust, you will not see much a a HP gain. The 3.1L is a 2.8 at heart. They changed the pistons and heads and have gotten the engine from 125hp to 175hp. The engine has been pulled as tight as it can, without putting some big bucks in the internals. Then you can boost it. If your headgaskets will hold.
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