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They are definitely less restrictive, that is why they sound "nifty" but in my opinion the lower restriction means more crap in your engine. Stay with the stocker.
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78SC Porsche Targa, 71 911T
86 Mazda RX-7 ITS SCCA racer
05 Porsche Cayenne
05 F350 Powerstroke
90 Miata
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