I just bought a 97 civic that has been swapped with a d15b with a z6 head. I'm wondering what's the best way to produce power with this set up. Already has cold air intake, aftermarket headers and a full AEM catback exhaust.

 

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fixed that for ya.

OP, you might try checking the FAQ at the top of the forum.

Or if you don't wish to look through the FAQ you can always try one of these:

http://www.ebay.com/bhp/turbo-air-intake

I will give you a hint, the modifications on your car probably have not added any power to the base engine put in. Check your ECU. That will tell you where you sit.