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Everytime someone posts a 'What to do first to my Focus' type of thread, the cold air intake is at the top of all lists. I can hardly justify $300 for an AEM cold air or Volant. I mean, how much different can these possible be? Someone please explain to me why these long tubes with a cone filter make that much of a difference over a drop in in the stock airbox. I'd hate to think I wasted $35, but I'm starting to think I did.