I just wanted to share the joy of my new K&N I got a few days ago. Ever since I installed the thing, the truck had been running great, 'cept for those leaky valve seals makin the truck spew smoke . Anyway, the vibes when the truck idles have virtually dissapeared, and the truck has a bit more gitty-up in it. Now, ya'll have to remember, I have a stock '87 350. So, any improvement is like a miracle to me. I'm sure no one with a worked engine would go back to a stock one (unless they were bustin parts or something). If you don't have a K&N by now, I'd definately reccomend it. http://billybob.coloradok5.com It's all fun 'n games, till someone gets stuck.