this is no bull crap. of all the things i've done to my 2000 GTP since i bought it in december , taking out the old airbox and putting on a 9 inch spectre cone filter made the most noticeable difference. that includes plugs , wires , every filter, every fluid, 3 inch DP, plog, overkill pcm, O2 sensors , PCV valve , royal purple synthetic... out of all that the air filter change was the only thing that improved my fuel mileage, and gave a noticeable difference in throttle response.all done at different times except plugs and wires so i know what made what difference. got about 1.5 mpg from the filter . sounds crazy huh ?Originally Posted by idrivejunk
