US early style top central vent.
So there are 2 version for the US market of the top central vent.
The early versions (up to 1985) are supplied with manually operated thumbwheel (like this one we are selling here).
The later models had permanently closed vent.
Im not sure why they made this change, some say it allowed more air flow from the front vents, but the truth is, they stole your right to choose. They forced you not to use the top vent. They took your FREEDOM.
Every set includes.
- Connecting rod
- Flap that opens/closes the vent
- Vent cover