How can I reduce my exhaust by 2dB?

[Advan_01]

Hi Guys..... I went for my EPA test recently and got 92dB, I had my silencer on and not sure wat else can I do to reduce 2dB. Any suggestions?

[silver gts-t]

stuff something in the exaust.??

not worth buying a resonator for 2db

[4door_Sleeper]

Get a restrictor thet screws or clips into the tip. Any restriction should help reduce the noise.

[silver gts-t]

i think thats the silencer he was refering to

[awurth]

cut a piece of tin metal the same shape as a flange and drill a couple of 12mm holes in it. it dropped 4DB out of my car but they run like real pov so go home and pull it straight away. if it's afully welded system just stuff some steel mesh up it and then put the silencer back in it. QLD it's 94Db.

[Advan_01]

Anymore ideas?

[2BNVS]

yer all id say is stick some steel mesh in there some where that should do a bit, not like u need a full pro system just for the test, as long as it doesnt shoot out lol

ben...

[GTR R32]

If you just want to pass the test then the plate with holes in it between two flanges sounds like the best way to me. Another option would be to get an Apexi exhaust valve. It's a butterfly valve that you bolt between two flanges and it can be controlled by a cable in the cabin. So you can have it closed when you want it quiet or open when you want max power.

[Advan_01]

Never put a plate with some holes!!! I was told by the tester. That will give u another $500 straight fine.

[NXTIME]

I lost a few DB's by simply reducing the tip size. I went from 3" to a 2.5" tip and lost 4 dB's from memory. Cheaper and easier than a resonator. Otherwise, you may just have to add another resonator. Make sure that you get the exhasut shop to test the dB reading before you go back the the EPA.