Originally Posted by
preston
For anyone considering something similar, those strips would be quite a bit more effective with a flange. If you had the equipment (sheet metal brake) you would want to put a flange on each side, 1/2" if you had the room, and then use a metal shrinker to put an arc in them to match the roof line. I realize that's about $500 more in equipment (using Harbor Freight level tools, $2000 otherwise) than most people have in their shop though. And of course my next suggestion would be to weld the ends of the strips to the unibody stringers and now you're into ridiculous overkill ha ha. In my case I have the equipment but I think I would be perfectly happy with slapping some CLD on the roof and then stuffing as much melamine foam or equivalent between the headliner and the roof. But I definitely admire your dedication, and am interested if you notice a strong subjective improvement in roof flex. A lot of people don't make the effort to drop the headliner, but IME its definitely worth it, as you can see the roof is more unsupported than a door and while there is not much road noise coming through the roof, there is a ton of potential vibration even when you are sitting still. And noise absorbers on top of that really deaden the car. If you think about it the headliner is probably the single biggest area that you can put a noise absorber. A little pile of rock wool in the pillars and nooks of the vehicle seems almost pointless to me in comparison.