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The best HP gain intake you are goin to get is Joe-Z with stock box PERIOD. Anything out of that even the F-sport box is only allowing a high intake of engine bay heat.
Just installed my f sport air intake and made a quick before and after video for anyone who's interested. Also it's my first youtube video so keep that in mind
You should update the original post with a note that says you also have an F-Sport exhaust. The difference from stock intake + stock exhaust to F-Sport intake + stock exhaust is dramatic. I remember last year when I put my intake in RPM > 3500 sounded amazing! When I installed the F-Sport exhaust 6 months later I wondered where the growl went I do love the combo (F-sport exhaust + intake) it just sounds mean at WOT but it is hard to just isolate the intake noise.
Personally I'm not a fan of the louder intakes on the Lexus. I had a K&N typhoon on my RX-8 and it sounded worlds different when i installed it, but the sound seemed to fit that car and I liked it. However I think the Lexus is a bit too refined for a ricey sound. Just my two cents.
not sure about rx8 but my frnd has k&n sri on his lancer and is dam loud compared to mine on the 2is so i think application is a big factor too
honestly i like it though...below 3000rpm it's a refined luxury sport sedan....then when it hit 3000 the monster rips out (or..at least the sound haha)
so when i'm tired i just drove slow and the car is quiet...when i'm bored i rip it and it sounds amazing
Just installed my f sport air intake and made a quick before and after video for anyone who's interested. Also it's my first youtube video so keep that in mind
I have the F-Sport intake on my IS 250 and LOVE it. Fantastic noise, yet not too much. Sound kicks in around 4000 RPM and is mostly a low growl/grumble