June 08, 2016
Gotta get that Boom Boom Boom
I used this product on three vehicles, two of them recently, a 04' Mustang Cobra and 01' Volvo s60 T5, I will explain the latter more as the application was extensive and result more rewarding. For the Volvo, having the vehicle its entire life I am very in tune with its changes. I removed the rusting factory exhaust exhaust and down pipe replacing it with a full 3" system. Having both subtle droning in a narrow band of the rpm and an overall increase in interior resonance I removed the entire exhaust system, 4 heat shields along the exhaust tunnel on the under body, spare tire and jack from the trunk well. I used a total of 3 cans, spraying both sides of the heat shields, the under body (area underneath the heat shields), the trunk well, and the muffler well area. The result removed the existing drone as well as lower the interior sound of the exhaust in the car while retaining the improved sound quality.
The 04' Cobra received a coating to the spare tire well area only (I will post a picture with the spare/jack/fabric back in since there are enough pictures showing an empty well sprayed). The change was inaudible. The vehicle has a lot of noise supporting modifications including being a cammed stroker with a full off road exhaust system so I wasn't expecting a change, and will therefor continue application with a follow up in the future.
I do have a third example for a 97' Cobra I owned years back having purchased boom mat from AM, but never did review. Important note, this car was naturally aspirated with higher compression, a lot of weight reduction, full exhaust (BBK 1 5/8 long tubes, BBK X pipe, flow master 40, shortened and dumped early underneath). I sprayed under the aftermarket front seats underneath the sound deadening insulation, entire rear seat area including floor, c pillars, seating area (under rear seat delete kit), and trunk (including spare tire well). The noise inside the car became very tolerable. The interior sound quality really improved and actually became very enjoyable too. I used a total of 4 cans.
Application is simple and as an example 2 cans can generously cover the entire trunk interior. Shake the can often before and in between use. Some build up on the nozzle occurred a few times, just wipe, shake and test before continuing. It is all well explained on the can. If you start inverting the can, such as when I sprayed the under body of the Volvo along the exhaust tunnel, do so before the can gets down to about 1/3, otherwise the spray material is limited and it gets frustrating. Also, be mindful of higher temperatures approaching the header/manifold area. Header wraps, heat shielding and other high temp resistant material is recommended as this product is rated to 300*F.