This kit offers higher levels of rotor sound (whine) within the cabin due to the direct path through the firewall.
The Stage 2 Sound Tube Kit
This Kit requires that the firewall is drilled.
1 x 1 x 3/4” hole saw
1 x Blade
1 x large rubber grommets
1 x 1 ¼” NPT to 1” hose barb fitting