Go with the pop-charger, I had the stock box with k&n and it was ok...but you can't beat the sound of the pop-charger.

 

k&n drop in air filter and jwt pop charger have the same butt dyno for me. I do like the look and sound of the pop charger. But performance wise their is no difference.

 

Thats what I figured.

 

yup believe it or not the stock air box is actually designed pretty well, especially the 06 ones with the venturi ring. so the drop-in helps squeeze out a few more ponies with better air flow. i also had the popcharger and the sound is more sporty. but all in all i think there won't be much of a difference in power, give or take a few HP.

It's all up to you, you want to stay stock or go for the sportier look or sound. but the transmission won't matter unless the part specifies that its for either MT or AT

 

hmm, interesting.

I thought that a straight tube would suck more air in, than stock without that boxy thing.

Should I sell my injen short-ram and put my stock '06 airbox on with K&N?

 

maybe what this guy is trying to say is different for MT and AT
meaning rev-up and non rev-up, i have 06 AT which comes with
non rev-up engine

 

Either way it won't make much difference, but I guarantee your stock box is more resistant to heat soak effects.

If you really love the sound of your intake though, you may wish to keep it.