K&N Engineering has developed a performance air intake system
(57-2573) that is street legal in 50 states for the Ford
Explorer with 4.6 liter 3 Valve V8 engine. K&N dynamometer testing shows an
11.0 horsepower gain at 4500 rpm.
To immediately see the benefits of a K&N air intake system,
simply replace the Explorerís original intake assembly with the
57-2573. Cooler outside air is drawn through a washable and reusable
K&N chrome top air filter (RF-1048) for more power and filtering
A powder coated steel heat shield replaces the stock air box and
protects the K&N air filter while isolating it from engine heat.
The 57-2573 uses the OE Mass Airflow Sensor. Although the MAF is
re-positioned to gain the benefits of additional horsepower, no
computer programming is required.
The K&N air intake system can be installed in 90 minutes or less
with simple hand tools and comes with the famous K&N Million Mile