Definitely makes a difference.
I installed the K&N 69 Series intake system on my Lexus GS350. It took about 30 minutes, start to finish. I immediately noticed a significant improvement in throttle responsiveness and pickup. Prior to installation of the the K&N intake system, i really had to put my foot in it particularly on the low end to get it to quickly accelerate. Delivery of the system was quick, just a few days and AutoAnything has great Customer Service-very responsive to questions/concerns.
Cheap air box cover, not the nice one shown in the pictures
Don't like the cheap looking air box cover they now send you, not the nice one that is in the pictures. Volant said the nice cover they no longer make when I called them. Other then that it seems like its good quality tho how it mounts to to the throttle body it think could be way better and the bolts are to short. Of all the after market fresh air intakes I think the Volant is still the best one though.