The exhaust isnt that bad on the car. It is 3" turbo back, but has additional resonators/mufflers to quieten it down. Not your typical WRX 3" exhaust with large cannon tip - put it that way.
Its actually an APS exhaust, and to quote their website info about it:
Other developments included an exhaust system that wouldn't foul the underbody, was neat, would meet EPA noise limitations and yet provide excellent performance. A number of pipe configurations and sizes were tried along with various catalytic converters and something like 10 different mufflers. The '"inner" punches out a quiet and legal spot-on 90dB and consists of 3" mandrel bent aluminised steel pipe, a high flow catalytic converter, resonator and stainless steel muffler with an off-set, perforated tube design. And for those who don't know, 90dB is the maximum legal noise permitted by the EPA and, if ever pulled over by the police, APS can supply the appropriate ADR37 emission and noise test report documentation supporting its legality.
Anyways... With that said, i still love the Subaru burble and dont want to eliminate it completely, just quieten it down somewhat. Im sure once i have the rear seat in and Dynapad over the diff hump/under the rear seat, i'll be more than happy with the results, and may give Dynapadding the boot floor a miss. That, and im running out of Dynapad! haha... But we shall see how it sounds once im done with what i have left. Ive come this far, im not going to half arse it if im not happy with it. If i need more Dynapad, then so be it!
So i was thinking, ill Dynapad under the rear seat bottom? Or just not bother since the 5" thick foam will absorb some of the sound? What do you think?
And the rear diff hump there where the boot meets the back seat? There seems to be a fair bit of noise coming from this area from what i can tell.
Then save some of the Dynapad for inside the boot and mainly on the rear wheel arches to kill off any of the other noise.
Hopefully deadening the parcel shelf, boot lid, rear quarter panels, rear wheel arches and a few other areas inside the boot will also help kill off a little bit more noise.
Good plan? Or nah? Suggestions are most certainly welcome. I have heaps of Dynamat left, but only one sheet of Dynapad (though ill get another one if i must lol)...
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