I'm going for k&n drop in filters with cobb tubes. Slightly less hp gains but for a fraction of the cost.
Now let me say, before I get flamed, that by slightly less hp gains I mean after also having CBE and HFC. It's been shown that after you already have the CBE and HFC that the stillen intakes only give about 7-8hp rather than the 15hp that you see when adding it to a stock car. The k&n drop in filters will give you 5hp and cost much less.
Not saying the stillens are bad or anything, just not the route I'm going as I really don't want to worry about removing the bumper. To the original poster, consider all your options before making your choice. Lastly, as far as first mods go I would do exhaust. Not only do you get a nice hp boost but you also get a nice upgrade in how the car sounds. Again, just the route I took.
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