i havent taken mine to the dyno but i noticed a difference as soon as i installed them and then it got so much better with the berk hfc and cbe....so i say get em....u will notice the difference and the sound is so nice when u have WOT
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 09 Monterey Blue 6 SPD:: Stillen Gen 3 Intakes:: Berk CBE:: DIY Black Fang and Rear Valance:: Z Enclosure 2 10" Upfire Box:: Berk HFC
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