The Lexus ISF K&N drop-in filter should be one of your first ISF upgrades! This is a proven upgrade that gains power and helps unleash the ISF's V8 engine intake sound! We highly suggest keeping the stock plastic intake box because it does not suffer as badly from heat soak as other after market metal tube units. Below is a list of features for K&N drop-in filters.
High Air Flow and Excellent Filtration
Designed to increase horse power
Washable and Reuseable
Will NOT void vehicle warranty
Emissions legal in all 50 states
Economical, a K&N Air Filter Will Last the Life of Your Automobile