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i have a injen CAI and i recently installed a ported throttle body. I can't speak to exact hp numbers, but after i installed the TB i noticed a noticable increase in the low-midrange rpms. Also, there was an imporvement in throttle response. I have had my CAI for 2 years, so the performance increase from that has become normal for me, however after i installed the tb i did notice my car responded better.
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