Waste of money.

Why foaming is not done by manufacturer? Because steel is stronger than foam.

but, if you want to spend it, go ahead. Foaming is snake oil, like adding oil additives (if you use branded oil and your car has no inherent issues).

Foam in crevices only works as sound dampener. It does not assist in structure integrity. You can do a simple test.

Fill a pipe either steel or plastic. Knock the pipe before you foam it up. You can hear the hollow sound.

Foam it up wait to cure. Then knock the pipe again. It sounds rigid & solid.

Try to break the pipe, hammer, hydraulics, etc. They break the same way.

It is perceived structural strength.

Been reading this thread for awhile already. Been on the fence whether to do it or not. Currently on bmw f30 328i M sport with m adaptive suspension on m3 underbrace and ur strut bar.

So, my ride was pretty stiff. And i really do enjoy the firm and stiff ride, and looking for ways to further improve it while keeping the comfort unchanged as much as possible. That planted firm feeling when you take corners at high speed really is addicting. But daily driving it is a different story, given how bad our roads are in the city 😪. Reading how AF does help in reducing some noise and improve the chassis without weight penalty   sounds really great. As you know, sound deadening materials are heavy. While searching for more info regarding chassis foamin, i came across this post in a bimmer forum.

I might drop by Desmond shop one of these days to hear what he would say. I kinda believe it works because bobby also sent his s4 there for chassis foaming hahah

Local shops and their workers has nowhere near the expertise described in the article you quoted.

And don't believe everything Bobby says.

the only thing i felt is reduced noise each time the a/c compressor kicks, that's all, in terms of vibration, it should be reduced through use of mountings and bushings, this foam not going to reduce those noises, and yes, i spent rm800 in my alza for this

Actually you can get almost Rolls levels of sound dampening even on a Kancil. But that would mean welding more metal and installing foam sheets that would make the car heavy as hell. Top end cars are not heavy because of the big capacity engine or those thick and deep seats alone. The amount of sound dampening are insane in those cars. And none of it involve injecting stuff between metal crevices. Expensive tires help too. 

no, rm800 package only fill up the two tunnel at the bottom of the car, how do you expect this will reduce body roll?

You have to do a lot for soundproofing to be effective. This will be expensive and add weight to your car increasing fuel consumption. Dismantling seats, body panels and dashboard may cause rattles and squeaks in future. In my opinion not worth it. Soundproofing is best done in the factory. If you want good NVH buy a better car.