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Increases the in-cabin rotor sound by up to 75% Foster SC Stage 2 Kit works on both closed air box and open filter or aftermarket CAI systems. No drilling through the firewall required, but opening the existing hole to 1/38” increases whine. Connects from inlet pipe through the OEM sound tube location. Sealed sound tub

Save on MUSTANG GT500 2010-2014 SVT STAGE 2 open filter inlet whine mod kit 75% WHINE INCREASE SKU 135 with a Foster SC Mods discount code

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