Used on 95 maxima on doors and made a great difference. Used on rear deck and was amazed! Put new JBL GTO 638's in place of Bose system that came in car. The dynamat kit really helped out. I recommend for any part of your car.

I bought this to improve the cab sound in my Dakota Quad Cab when I was installing new speakers (my wife blew out the old ones!!). It was very easy to work with and install. All I needed was a utility knife to cut the mat to the sizes I needed for the install. It will stay on after it is in place but it is forgiving on install. This means you can make adjustments with the piece you are working with before you roller it down. Using the roller tool (sold separately)was worth the price of admission. It definitely made install easier and was able to clear any air pockets as well as give excellent adhesion.

RESULTS: After the install there was a quick difference that could be heard. First thing you noticed is that when the doors are closed they sound more like a luxury car door closing. No more hollow sound, they sounded more solid. The sound in the cab is reduced and this is noticeable when no radio is on. Road noise has been reduced and it is a much nicer environment. As for the music...much nicer listening and clearer due to no competing noises from the road. Everyone who enters the vehicle likes it and knows there is a difference.

NOTES: I installed this on the inner door and the outer door. Some sites and installers will tell you this is unnecessary but if you are in the door why not. The thin sheet metal is all that is between you and the road. This pack covered two doors in the front. I bought two boxes to cover all four doors. It took one afternoon to install and it was complete. This is not a hard project at all. If you can get the door panels on and off you can install this product.

PRICE: I checked all over the internet and found that Amazon had the best price for this. From my experience this is likely to continue. Free shipping just solidified the deal. Check what you might need and compare the 4 sheet and 9 sheet boxes. Most of the time 2 4 sheet boxes will be cheaper per square inch and get the job done. Check prices and decide before you purchase.

OVERALL: I am very pleased with this product and would recommend it to anyone. It does what it is advertised to and is very easy to install. It will not make much difference if your vehicle has a lot of soundproofing already but if your car does not then this will do wonders.
My truck had some very small pieces of factory mat in the outer door metal already. They were just covered by the Dynamat. You may find the same thing during your install. They must think the truck needed some. I just took it up a notch.

This stuff is much thicker and does a better job.

Dynamat 20410 Xtreme Shop 4 Sq

But I went with another company Amazon # B000P70UP8
You get 6 SQ. FT vs. the 4 SQ FT on the Dynamat.

Personally I like the quality of the Q-Pads much better.
Fibreglass Evercoat 116 Q-Pads Sound Deadener 12 x 12 (6 Per Pack)

I installed them on the outdoor door skin (On the inside of course)
and I went three layers. I sprayed the
3M(tm) Underseal(tm) Rubberized Undercoating, 08883
on the bottom areas I could not reach.
This is the best rubberized undercoating, it dries fast & great.
It will not rubb-off or make a mess like cheap undercoatings.
We tested this stuff with gasoline on a piece of scrap, we undercoated
a piece of metal then the next day we poured gas on it and let it dry on the undercoating,
We then tried to wipe-off the undercoating with a towel. Nothing, It did not hurt the coating at all.

All the cheap undercoatings we bought and tested from Walmart, Pep-Boys etc. all failed
and the stuff melted and was like tar from a roof. I'm glad I never put any cheap stuff on my cars.

I also undercoated the underside of the Van with the 3M(tm) Underseal, maybe 16 cans total.
In some areas like under the drivers and pass seats on the underside of the van I installed the Q-Pads
right to the painted sheet metal. So both sides of the floor are done the best I could do it.
After I used the Q-Pads I sprayed the 3M(tm) Underseal(tm) on top of the Q-Pads to give it a waterproof coating
and it all looks black on the underside. If you have some good workers and you buy plenty of material
you can really improve the soundproofing. I gave the manager at my local Oil Change Shop 3 cases of Beer for his guys to install the materials for me. I pulled up to the Pit (Hole in the Ground to work) and the Gents did a first class Job. Two of my guys were there also. The Pit type of shop is great because you can get to every angle of the underside using a 4-6 ft. step ladder. We did the wheel wells also, that helped so much.

Now the ride is very quiet. The Undercoating on the underside was done after the Q-Pads and Dynamat was installed so we could truly hear the difference. Paper-Mask-Off all your Labels on the Frame, Shocks, etc to avoid any overspray.

I have a Turbo Diesel 7.3L Ford Conversion Van with a Magnaflow 4" Stainless Exhaust and I wrapped the entire Exhaust including the Down Pipe, Turbo, Muffler, all the pipe and TailPipe. This is the stuff they use to wrap the Headers at NASCAR. It's called Thermo-Tec 2" Heat Tape, Amazon # ASIN: B00029KC02
# Item model number: 11002 .

This was the best mod I did to cut the interior noise level down. This Heat Tape did the job. 2 Boxes did the whole job and 2 boxes of the stainless steel clamps by the same company.

All together I spent about 600.00 for everything, but it is well worth it.
I also installed the Q-Pads under the front hood, then the Dynamat Hood Liner.
Don't forget your firewall on the cars/vans interior. The Firewall is important.

I hope my tips may help a few of you. Don't think one layer of Dynamat is going to make a big deal.

When people ride in my van it's like a mobile Living Room, quiet and comfortable.

Best of Fun to You All.

I bought this to cover some areas that the original dynomatt buy didnt, and it performed much greater than i had ever expected it too.

It works well, I am surprised that someone else does not make it[cheaper]. It is a very low tech material. We used it in the doors of a friends car when speakers were replaced and spent over $100. I bought three cans of rubberized undercoat at Wally-World for about $5 per can and my doors were just as quiet. I guess it is just personal preference and economic priority, for me the extra $85 in the pocket was better. My friend, well he spends money like a drunken sailor...not to offend any drunken sailors out there.