Title: It worths the bang
Product review: I just had it install on my 2011 IS350. I agree with other reviewers. The installation process was fairly easy though the instruction is not good. It took me ~2hrs to get the job done. Everything fits well, I only have to trim off a bit of the excess cushion trimming for the heat shield. K&N; should have the trimming pre-installed on the heat shield! Anyways, with minor improvement in the installation instruction, the installation shouldn't take ~60min or less.Now back to the main thing that is the performance improvment:1. My IS350 now growls when I push the gas pedal, I like the sounds. It preserve the quietness of the lexus if you don't throttle hard but growl when pushed.2. It reponses better, maybe the sound affect make me feel that way.3. Seems to improve on the gas milage but honestly I can't tell the different yet.
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