You never need to replace the air filter again!
This works with Fords, Lincolns, Mercurys, BMWs, Chevrolets, and most others.
Now the average added HP is 7-12 HP, but you may gain more or less depending on your car or truck.
If you want to do this on the cheap, I recommend Spectre Performance Parts.
( http://www.spectreperformance.com/#HOME )
If you want to go all the way and pimp your car out, go with K&N parts.
( http://www.knfilters.com/ )
This is my first Instructable, so go easy. :)
I'm not responsible for any damage you do to your car or to yourself.
Step 1: Measure Your Intake
Use a ruler, or ask a professional what size your intake is.
Get parts in your intake size.