Don's original question was whether or not a cone is better than a drop-in. There's been some good testing of this, but don't forget that Don said he had a '98 with the old restrictive air box. The '99+ GP's have a less restrictive air box right from the factory. If you go with a cone you'll almost definately have to move your coolant bottle, but I do think it's a worthwhile mod. When I did mine I did notice an improvement, but I never used a K&N drop in. Good luck.