Originally Posted by pyroinsa
Best way to get HP out of a Zetec is to swap over SVT parts. The stock SVT airbox and snorkel is bigger and provides better gains than your AEM.
That is the only cheap HP mod you can do.
The best one would be the SVT header conversion for about $450 for around a 10+hp gain.
Cheap will never get you any go
Don't "think outside the box".
There is no box.
Do it correct, or do it twice.