You can get a free K&N cabin air filter with the purchase of any K&N cold air intake. You're going to love this combo of guaranteed horsepower along with cleaner cabin air. The cabin air filter is washable and reusable. Just add the intake and cabin air filter to your card and this discount will be automatically applied. You need to hurry, though. That's because this offer is only valid through April 15! For more information, call 800-858-3333 or click here.