I just purchased a new K&N FIPK Filter at AutoZone for 159.99 which I think is a good deal. Is the horsepower rating on this filter true. It gives a dyno sheet that between 4400-6500 rpm it makes at least 20 hp gain. Seems pretty high. My next step is some drag radials. I'm hoping for 12.2-12.5 next year on these two modifications. Do you guys think that this is possible?

Joe
03 cobra- 1800 mile-how many mile does it take for this engines to loosen up?

 

its definetly possible with cold air and radials depending on your elevation, my buddy pulled a 12.8 at 5000+feet with no mufflers and cold air and street tires