The following Cold Air Intakes were designed to fit your Lexus IS 350:
AFE Cold Air Intakes- $224.95
Injen SP Series Cold Air Intake- $196.57
K&N 69 Series Typhoon Intake Systems- $172.50
Model years for IS 350 cold air intakes include 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999 and earlier.