I have left my original exhaus
I have left my original exhaust in my 355, but I replaced the Cats wiyh Quick Silver Test pipes!
The car sounds a little louder on idle, but when it hits 3500 RPM's the thing sounds like heaven!
(I'm not using the radio any more).
Not to mention that the engine runs better and with less restriction. (Inspection sticker may be an issue).
VS
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