I really feel an improvement after installing it. The car accelerates so smoothly and a little faster than before. The only thing I noticed after driving for a while was the noise of the engine. I don't know if it's just my own ears, but I don't notice any improvement in engine sound. It sounds a little quieter to me now. I don't know if it's my stock exhaust or some other reason why it seems to be quiet. I have a stock exhaust on my 2008 350z Touring. It sounded good when the air boxes were still on in the car. I was satisfied with the sound of the engine and the exhaust. Now I was expecting both to have a change in sound. I expected louder. But somehow it was rejected. a little, but not that bad. now I don't know how to explain it. Maybe I should buy a Nismo or aftermarket exhaust to get one. best sound. But the sound is not critical for me. Just want to let you know what I observed when these inlets were installed. Also, I had a licensed mechanic to make sure everything was bolted on properly. No leaks.
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