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Just bought a 2000 STS and want to install Borla XS mufflers. Does anyone know the diameter of the stock pipe into and out of the muffler? Has the forum reached a general conclusion of wht muffler actually works best on the STS. I know that last sentence is very subjective. I want mello sound without a lot of noise or drone in the car - while gaining some flow and performance. Thanks!
 
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