Quote:
Originally Posted by xjohnx
out of curiosity I removed my K&N Panel Filter and reinstalled the stock filter on my Visconti Tuned BRZ. Engine seems a lot smoother in the 1500-3000 RPM range.
Doubt that will help anyone here, but just an observation.
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But it feels held up in the higher end.
Your observation along with this one is what I found when I removed the K&N drop in filter to go back to stock.