So after some research and careful reading of this thread I have found that a CIA added to the 06 IS350 does little more than produce better sound. My friend has an american v8 and when he added a KnM CIA it made a huge difference in HP and sound. I'm guessing superior engineering on the part of Lexus is the reason why.

So my question. Has anyone really seen great results that generated in better driver enjoyment/sound/performance or is the CIA just a waste of Money

 

what's a cia.........? you mean cai?
what's knm.........? you mean k&n?
ther'es no cai for this car
k&n intake for this car is a short ram with a heatshield which doesn't do much
it provides more sound and less power

a true cai with a tune will produce some good gain, but neither are available for the lexus

 

Thanks Reyo,

I meant Cold Air Intake by Cai. Thanks for the response it helps alot.

 

This guy is correct