DEI door sound damping kit for all generations
DEI door sound damping kit for all generations
Couldn't load pickup availability
Collapsible content
Description
Miata doors aren't big relative to most car doors, but they're still big expanses of mostly flat sheet metal, which makes them very prone to resonance and rattling - knock on the outside metal and take note of how loud and rattly it is. This kit, like our sound damping kit, uses pre-cut pieces of DEI's Boom Mat sound damping material to absorb those vibrations and quiet down your interior. They also make a big difference to how good your music sounds (since your speakers won't rattle the doors anymore), and give a solid "thunk" when you close the door, as opposed to the normal rattle. Easy install, just remove the door panel and the plastic sheet behind it (watch that black goo, it gets on everything), firmly press the pieces into place, re-assemble, and enjoy your quieter car. Includes enough pieces for both doors (one kit = one car).
This kit is designed for the NA and NB, but will work for the NC and ND as well with a little trimming (it's not too bad to cut with a razor blade or good scissors).
Boom Mat is a premium quality sound damping material that keeps interior panels from vibrating and generating noise by trapping that noise between an asphalt-free butyl lower layer and a 40 mil (.004" / .1mm) thick aluminum top skin (.080" / 2mm thick in total). Since Boom Mat doesn't need to cover the entire area to do its job, you spend less money and add less weight to get the job done.
While this kit doesn't make a huge difference to the decibel measurement, it's in the right range, and keeps the metal panels from acting as transducers. Which makes the car much more livable an improves the sound of the stereo.
Instructions
Shipping
$9.99 flat rate shipping. Orders over $40 ship for free in the US!
Details
There are no shipping restrictions on this item.
What does it fit?
Fits: 1990-1997, 1999-2005, 2004-2005 MSM, 2006-2015, 2007-2015 PRHT, 2016-2025, 2017-2020 Fiat, 2017-2025 RF
Emissions
Emissions do not apply.
Warranty
lifetime
SKU
I did the full car insulation and dampening kit about two weeks ago, and was able to notice a difference with that, but I didn’t do the doors at the same time because of time, and I also wanted to do the window bushings while I was in there.
Well I did the doors and once again, there is a noticeable difference in the way the car sounds in all sorts of situations. The doors close with a thunk instead of a boom, and I can even tell a difference the way it sounds to put the key into the door handle.
The only thing I would have liked is an installation video, like the main kit but shorter. I didn’t understand what was meant by “outer door skin” in the instruction, and ended up putting the first 6x12 piece on the painted part directly underneath the vapor barrier. That was a pain to remove, and I ended up tearing it in half in the process. Some tips for how to deal with the vapor barrier and the tar that keeps it on would be appreciated, as most of the people doing windows bushings say they just remove the vapor barrier and clean up all the tar because they don’t want to have to deal with it anymore. This will make the door cards more likely to mold, but how much more likely? Is it worth deleting the vapor barrier? (Well I guess it probably isn’t, since I shouldn’t ever have to go back there again. But one of mine was torn and had gaps in the seal around the edges. Is it important enough to be worth replacing?)
Thanks for your review, Phoenix! Sorry you had a bit of a struggle with the installation instruction verbiage - we'll ask our Engineers to update the instructions to make it a bit clearer. The vapor barrier and tar are definitely a bit of a pain to deal with, but they do help keep moisture and dust out of the cabin, so they're generally a good idea. Also, the vapor barrier (if intact) can help the sound quality of the door speakers to a small degree thanks to providing some seal to the door cavity. They aren't strictly necessary, but a good idea to have if you can keep put them back in place when you're done.
Okay, real talk. I had 0 intention of leaving a review for this product. I had expectations that were pretty low because I was to the point where I thought my Miata door rattle was too far gone to really make a difference...but hey, $25 is an affordable way to FAFO.
HOLY HOT DAMN! I'm so mad at myself for not doing this on day 1! Legit, best improvement-for-cost mod on my car by far. I can actually listen to my radio above 7 with out wondering if the Spice Girls song is bumping hard or if I'm losing random nuts/bolts on my drive.
Rattles are practically gone, door shuts smoother, and I can now officially confirm the Spice Girls WERE bumping hard!
Paired with the body kit, further reduces road noise especially of cars next to you.
I was replacing the window bushing that causes the power windows to operate very slowly. While I was in there, I decided to install this sound deadening kit. The instructions were easy to follow and I had already done the majority of the work involved anyway.
I would recommend taking some time to refresh your door components all at once. Replace your worn window bushing, adjust your window stops for a better seal against the soft top, replace the door bushings, and install this sound deadening.
The most noticeable difference was the noise the doors make when you close them. You hear a satisfying thunk without any rattling. There seems to be less vibrations translated to the doors at highway speeds as well.
Ignored the instructions and just covered the whole door with the insulation during a speaker upgrade. Helped with speaker improvement and road noise reduction. Great value