rockyland Posted July 6, 2012 Report Share Posted July 6, 2012 why is it important to have a exhaust filter when the exhaust is getting thrown out anyways? Link to comment Share on other sites More sharing options...
najeeb Posted July 7, 2012 Report Share Posted July 7, 2012 this filter is usually used to protect the environment of deadly gases which pollute the environment. Link to comment Share on other sites More sharing options...
LivingLarge Posted July 16, 2012 Report Share Posted July 16, 2012 Also they are used to lower the amount of noise. Exhausts account for most of the sound that a vehicle produces, so it makes sense to try to muffle the cities a bit. Link to comment Share on other sites More sharing options...
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