I am sure that if I knew how to work the search engine for this site I would find this, but since I can't I would appreciate any help, so I have an AEM cold air intake for my lancer and I want to upgrade the exahust and I am looking at the greddy evo system and the rrm test pipe and muffler. Do I need the entire system or does the test pipe and muffler cover what I need. Also I have read a few places that he evo is for non turbos only so does that mean I cant' go turbo with it or what. Thanks

 

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Smile because you prevented another duplicate thread.

Unless you're creating serious backpressure a la forced induction, freeing up your exhaust isn't going to make a huge change so it's pretty much up to you what sound/combo you want to go for.