Be very careful with aftermarket intakes and air filters. Turbos do not like dirt of any size. K&N are known for getting good flow suitable for standard engines but not necessarily good for turbos. Ford for example void the warrantee on the truck turbos if you have an aftermarket K&N. It's the old debate about aftermarket parts, but here I think it might have legs.
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Bill P.
2009 Crimson Z4 35i
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