I did use one for my tC for my second last oil change. It was a b!tch to take off. And I never witnessed my car not starting well & no starts so much in my life. Sluggish acceleration. My gas mileage was terrible.
Last time I used a K&N...What a difference!!! Smoother starts even on cold mornings. Seems like the car likes it better. Everything seems to be better.
If you still want to get one....
__________________ xA to tC then xB2 now-Camry SE: looks like I'm getting closer to owning my IS-F