I went with an AFE, which I installed a few months ago. Quality is excellent. Fuel consumption improved by 1.5mpg. It's probably all in my mind but the X feels more responsive. The vehicle is not too loud, just perfect. AFE's customer service is outstanding.

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Warning, I'm prone to sudden attacks of enthusiasm





In the garage
2008 Infiniti G37S Coupe (Traded)
2011 BMW X5 xDrive35i
2011 BMW X5 xDrive50i