- 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 tube with special diaphragm cap installed on end of sound tube inside cabin.
- No Stock sound tube required.