I recently just purchased a K&N Filter and Z Tube combo, as I have read this is the best for the 06 6MT. Does anyone have a CAI? Did you experience a difference?

 

I have a JWT Popcharger with a Ztube. Didn't really notice much difference at all, mostly just the engine sound is a lot more pronounced from the Ztube replacing the stock baffled intake tube. And I have a whistle from the cone filter on the popcharger. MPG might have increased slightly, but thats about it. Its mostly for looks and sound.

 

Yeah I do like the sound of the JWT Pop Charger, but I am fine with my K&N Drop-In.

 

Stillen w/Z-tube