MUSTANG GT500 2010-2014 SVT STAGE 2 open filter inlet whine mod kit 75% WHINE INCREASE SKU 135 UNK Drilling through the firewall required

Drilling through the firewall required (bit provided)

Foster SC Stage 4 Kit works on both closed air box and open filter or aftermarket CAI systems

Various versions have evolved over the years

Increases the in-cabin rotor sound by up to 100%

but also the leap into electronic typesetting

MUSTANG GT500 2010-2014 SVT STAGE 2 open filter inlet whine mod kit 75% WHINE INCREASE SKU 135 UNK Drilling through the firewall requiredIncreases 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 tube with special diaphragm cap installed on end of sound tube inside cabin. No Stock sound tube required.