K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instructionsheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.

Application

2008-2015 Audi R8 4.2L

Warranty Information

K&N Warranty Info (PDF)

CARB warning

K&N E-0668 Specifications

KEY SPECS
MFG. Part #	E-0668
Brand	K&N

GENERAL
Material Type	Cotton Gauze
Overall Height	6.625"
Shape	Round Straight
GTIN Code	024844312167

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Questions & Answers

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Fitment

2008-2015 Audi R8