Proud BA XR6 Owner!
Join Date: Mar 2002
Location: Victoria, Australia
I have an EF1 with a K&N air filter. As said by others, you wont notice incrediable performance benifits, but you will notice that the car runs smoother, and idle a bit better. Also, you economy will hopefully be helped (I know mine was:)) I found that the filter wasn't so much for performance, but as an aid for the engine to run better for the whole shot.
One thing i found amusing is that when i installed mine, i also cleaned my throttle body and ISC. The first few starts it ran like shit (I thought i screwed somthing) but i was only the ECU getting used to it. Give the intake system a once over when u put the filter in (Coz u silly if u dont) and give the ECU a week. After that u should be sitting pretty.
Hopefully u will run 10's (LOL!!!!!!)
Take it easy,