With just the pipes, no, but with the BAK, you are wasting your money if you don't get a PCIII, since without it, you won't get a power increase, and quite possibly you would see a loss. Also, with the BAK you could be getting in the seriously lean range that you would not get into with just the pipes.
BUY ONE!!! You will not be dissappointed.
Oh, and the next post after this one will probably be someone letting you know that, before you post a question, especially a simple one like this, use the search function on the forum and you will probably find the answer you need. So, use the search function first, then post.[/emoticons/emotion-5.gif]
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