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· Oh, Herro!
3,414 Posts
You can definately have just a CAI, but you're not going to see quite as large of gains as if you upgraded the exhaust. You see, there are three basic boltons that form a sort of "modification trinity" - Intake, Header, Exhaust. They, in a sense, have a greater effect together than their individual increases combined. But, just a CAI will free up a few HP.
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