What is the size of outlet of the factory pipe (3.5?)? The pics i've seen of it (silverline's anyway) has the flange on the end, wasn't sure if it would make any difference since it was 4" at the front pipe out going into 3.5 stock (for now  ). Thanks, need the input so i can get a decision made on what/how to finish the exhaust. Any of the vendors have prices or info, feel free to answer or pm.
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'05 CC/SB, Stock with the exception of KN Cold Air Intake, now added PPE Tuner (more to come......), damn cat finally fell off, looking to finish off the rest with 4",
Last edited by K9Duramax : 05-07-2008 at 08:19 AM.
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