I have an open air kit made by Street Smart. I bought two, one for our ST and one for my pal's Sport. He bailed on the kit though and I've had it for a few years up in the attic. I also have a performance mass air meter (Pro-M) to go with it:
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Street Smart doesn't sell them anymore (they now are dealers for K&N and others) but we like the kit and still have it on our ST, as shown here:
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Originally the kit was over $200 and it was another $300 for the Pro-M chrome bullet meter. I'll sell the whole thing, cold air kit and meter, for $300.
The only mod we had to do to fit it on our '02 was drill a hole in the tube for the breather hose near the throttle body.
Let me know...
Mark