From what I know, the car's worst emmisions is when it looses rpm's real quick, like in pressing in the clutch at high rpm. To help with this, ford makes the rpm's drop slower, helping out with emmissions... complete crap if you ask me, but thats the EPA for you!!! Peace!
-Nick

"My family hauler can kick your family hauler's @SS!"
~~~~1999 Contour SE Sport~~~~
-KKM True Rev
-Custom cat back Flowmaster exhaust
-All Cat's fixed.
-SHO Shop Off-Road Y-pipe
-Many other Mod's done...