MUSTANG GT 2005-2009 ROUSH DS STAGE 4 open filter inlet SOUND TUBE KIT 75% WHINE INCREASE SKU 130 UNK Increases the in-cabin rotor sound

Increases the in-cabin rotor sound by up to 75%

Increases the in-cabin rotor sound by up to 50%

sometimes by accident

Foster SC Kit couples with part of the stock sound tubes – makes installation easy

MUSTANG GT 2005-2009 ROUSH DS STAGE 4 open filter inlet SOUND TUBE KIT 75% WHINE INCREASE SKU 130 UNK Increases the in-cabin rotor soundIncreases 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. Drilling through the firewall required. 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. For drivers side supercharger inlets setups.