My brother has got a f-350 with a 5.4 and he wants to know what cold air he should go with. I know guys with air raid, K&N, and I have heard good things about AEM, but he wants to know what you guys would recomend. He also is considering an Air Raid throttle body spacer and he needs to know if it would be a good idea or not and if it would require any tuning. Let me know what ya'll thing.
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