How much does this cost to the nearest dollar?

K&N Cold Air Intake Kit Increase Acceleration & Towing Power, Guaranteed to Increase Horsepower up to 11HP Compatible with 3.6L, V6, JEEP Wrangler,
GUARANTEED INCREASE IN HORSEPOWER & TORQUE K&N cold air intake systems provide a less restrictive path for airflow, increasing the volume of cool, oxygen-rich air into your engine an estimated increase up to 11HP and up to 10 ft.lbs. of Torque HEAR THE GROWL K&N’s intake systems allow your engine to breathe and sound as it should- your engine will growl on acceleration and return to quiet once at speed DYNO TESTING YOU CAN TRUST K&N air intake horsepower/torque testing is performed on wheel-based

Price is $400.00
Price: $399.99