Lots of great replies. Fwiw , my Upholstry guy reverse engineered the factory headliner bow system and prior to fitment we ended up using two layers of jute. The heavier tar matt stuff might have stuck as well but I figured the extra weight (it's heavy sh%#) up high and the risk of coming unglued wasn't worth it.
I also used double door seals from WagonGear.
My FJ is almost Lexus quiet with wind noise greatly reduced verses the single OEM door seals. I have a Gamiviti rack and you hardly hear it at 70, let alone 50.
During my restore I used the following to quiet my rig:
-Jute x2 in roof (rain drops are muted)
-Cabin, Med pile carpet with 1 layer of jute
-Probably most important deadening technique-- I Tar matted every sq inch of floor / interior area. I double lined tunnel and rear cargo / wheel wells, as well as mat on inside door panels. This really helped with the tinny noises and the system sounds like a concert hall
-Double door seals. Kevin @ WagonGear.com
Love these seals. Only downside if your doors are sealed so well they don't just 'flop shut' like factory.
My Wife actually noticed how quiet the 60 is. So I know it's quiet. (Decibels at 65 are 74dba on smooth road. Phone app)
Ps: I'm running an H55 so that certainly helps. But even low speed around town, crappy roads the rig is.... [emoji347]
Hope this info helps.
Ps: yikes...sorry for the ramble....way more than your original headliner quiet question.
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