The stock intake is best unless you go long tube. Better yet, put the money towards the exhaust system.
Taking the bumper off is easier than you think and can be done by a novice in less than 30min.'s. The hardest part is arranging the bolts as you take them off. It's a bit nerve racking the 1st time you do it, but once you see how to remove it, it will take you half the time. I do understand why you wouldn't go this route though since it would mean removing the bumper every time you need to clean the filter.
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[09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R]
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